{"id":54475,"date":"2026-05-31T10:48:09","date_gmt":"2026-05-31T03:48:09","guid":{"rendered":"https:\/\/coffeefactz.com\/?p=54475"},"modified":"2026-09-12T10:50:54","modified_gmt":"2026-09-12T03:50:54","slug":"thoi-gian-tiep-xuc-trong-pha-ca-phe","status":"publish","type":"post","link":"https:\/\/coffeefactz.com\/vi\/thoi-gian-tiep-xuc-trong-pha-ca-phe\/","title":{"rendered":"Th\u1eddi gian ti\u1ebfp x\u00fac trong pha c\u00e0 ph\u00ea: C\u00e1ch th\u1eddi l\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u1ecbnh h\u00ecnh m\u1ecdi h\u01b0\u01a1ng v\u1ecb"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Th\u1eddi gian ti\u1ebfp x\u00fac ch\u00ednh x\u00e1c c\u1ee7a c\u00e0 ph\u00ea l\u00e0 bi\u1ebfn s\u1ed1 \u1ea9n m\u00e0 h\u1ea7u h\u1ebft ng\u01b0\u1eddi pha ch\u1ebf th\u01b0\u1eddng b\u1ecf qua, nh\u01b0ng n\u00f3 l\u1ea1i l\u00e0 y\u1ebfu t\u1ed1 ki\u1ec3m so\u00e1t t\u1ea5t c\u1ea3. Trong khi c\u1ee1 xay v\u00e0 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc lu\u00f4n nh\u1eadn \u0111\u01b0\u1ee3c m\u1ecdi s\u1ef1 ch\u00fa \u00fd, th\u00ec ch\u00ednh kho\u1ea3ng th\u1eddi gian n\u01b0\u1edbc th\u1ef1c s\u1ef1 ch\u1ea1m v\u00e0o b\u1ed9t c\u00e0 ph\u00ea m\u1edbi quy\u1ebft \u0111\u1ecbnh li\u1ec7u axit tr\u00e1i c\u00e2y s\u1ebd l\u00e0m b\u1eebng s\u00e1ng t\u00e1ch c\u00e0 ph\u00ea hay ch\u1ea5t ch\u00e1t tannin s\u1ebd k\u00e9o t\u1ee5t n\u00f3 xu\u1ed1ng v\u1ecb \u0111\u1eafng ng\u1eaft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ng\u00e2m \u1ee7 (immersion) nh\u01b0 French Press c\u00f3 th\u1ec3 bao dung cho m\u1ed9t chi\u1ebfc \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd b\u1ecb l\u1ec7ch v\u00e0i ph\u00fat. Nh\u01b0ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p d\u00f2ng ch\u1ea3y qua (percolation) nh\u01b0 V60 s\u1ebd tr\u1eebng ph\u1ea1t \u0111i\u1ec1u \u0111\u00f3 ngay l\u1eadp t\u1ee9c. C\u0103n ch\u1ec9nh chu\u1ea9n x\u00e1c khung th\u1eddi gian ti\u1ebfp x\u00fac, t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t s\u1ebd ch\u1ea1m \u0111\u00fang \u0111i\u1ec3m v\u00e0ng n\u01a1i h\u01b0\u01a1ng v\u1ecb th\u0103ng hoa: \u0111\u1ee7 ng\u1eafn \u0111\u1ec3 gi\u1eef tr\u1ecdn v\u1ecb ng\u1ecdt thanh, \u0111\u1ee7 d\u00e0i \u0111\u1ec3 ph\u00e1t tri\u1ec3n chi\u1ec1u s\u00e2u l\u1eafng \u0111\u1ecdng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1eddi gian ti\u1ebfp x\u00fac th\u1ef1c s\u1ef1 c\u00f3 \u00fd ngh\u0129a g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1eddi gian ti\u1ebfp x\u00fac l\u00e0 t\u1ed5ng kho\u1ea3ng th\u1eddi gian n\u01b0\u1edbc ch\u1ea1m v\u00e0o b\u1ed9t c\u00e0 ph\u00ea v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, t\u00ednh t\u1eeb th\u1eddi \u0111i\u1ec3m gi\u1ecdt n\u01b0\u1edbc \u0111\u1ea7u ti\u00ean r\u01a1i xu\u1ed1ng b\u1ec1 m\u1eb7t l\u1edbp b\u1ed9t cho \u0111\u1ebfn khi d\u00f2ng ch\u1ea3y d\u1eebng l\u1ea1i ho\u00e0n to\u00e0n &#8211; d\u00f9 \u0111\u00f3 l\u00e0 gi\u1ecdt ch\u1ea3y cu\u1ed1i c\u00f9ng qua gi\u1ea5y l\u1ecdc hay l\u1ef1c nh\u1ea5n piston \u00e9p b\u00e3 t\u00e1ch kh\u1ecfi dung d\u1ecbch. Nghe c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, nh\u01b0ng th\u1ef1c t\u1ebf l\u1ea1i kh\u00f4ng h\u1ec1 gi\u1ea3n \u0111\u01a1n, b\u1edfi v\u00ec b\u1ea1n kh\u00f4ng th\u1ec3 c\u00e0i \u0111\u1eb7t n\u00f3 nh\u01b0 c\u00e1ch b\u1ea1n v\u1eb7n \u0111\u1ed3ng h\u1ed3 h\u1eb9n gi\u1edd nh\u00e0 b\u1ebfp.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y t\u01b0 duy theo c\u00e1ch n\u00e0y: th\u1eddi gian ti\u1ebfp x\u00fac l\u00e0 m\u1ed9t tri\u1ec7u ch\u1ee9ng (k\u1ebft qu\u1ea3 \u0111\u1ea7u ra), ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t n\u00fat b\u1ea5m c\u00e0i \u0111\u1eb7t. M\u1ecdi l\u1ef1a ch\u1ecdn b\u1ea1n \u0111\u01b0a ra tr\u01b0\u1edbc khi r\u00f3t n\u01b0\u1edbc (c\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc, \u0111\u1ecbnh l\u01b0\u1ee3ng c\u00e0 ph\u00ea, k\u1ef9 thu\u1eadt r\u00f3t) k\u1ebft h\u1ee3p l\u1ea1i v\u1edbi nhau \u0111\u1ec3 sinh ra th\u1eddi gian ti\u1ebfp x\u00fac nh\u01b0 m\u1ed9t k\u1ebft qu\u1ea3 t\u1ef1 nhi\u00ean. Khi m\u1ed9t c\u00f4ng th\u1ee9c ghi &#8220;h\u01b0\u1edbng t\u1edbi m\u1ed1c 3 ph\u00fat&#8221;, n\u00f3 kh\u00f4ng b\u1ea3o b\u1ea1n nh\u1ea5n n\u00fat r\u1ed3i ng\u1ed3i ch\u1edd. N\u00f3 \u0111ang b\u1ea3o b\u1ea1n h\u00e3y \u0111i\u1ec1u ch\u1ec9nh c\u00e1c bi\u1ebfn s\u1ed1 kh\u00e1c cho \u0111\u1ebfn khi con s\u1ed1 3 ph\u00fat t\u1ef1 \u0111\u1ed9ng xu\u1ea5t hi\u1ec7n.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-immersion-vs-percolation-1.webp\" alt=\"Coffee contact time immersion vs percolation\" class=\"wp-image-49921\" title=\"\" srcset=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-immersion-vs-percolation-1.webp 1280w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-immersion-vs-percolation-1-300x169.webp 300w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-immersion-vs-percolation-1-1024x576.webp 1024w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-immersion-vs-percolation-1-768x432.webp 768w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3n ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a &#8220;th\u1eddi gian&#8221; c\u0169ng thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ph\u00e1p pha b\u1ea1n ch\u1ecdn. Trong <strong>pha ng\u00e2m \u1ee7 (immersion)<\/strong> nh\u01b0 b\u00ecnh French press, AeroPress hay cupping th\u1eed n\u1ebfm, to\u00e0n b\u1ed9 l\u01b0\u1ee3ng n\u01b0\u1edbc n\u1eb1m y\u00ean c\u00f9ng b\u1ed9t c\u00e0 ph\u00ea trong su\u1ed1t qu\u00e1 tr\u00ecnh. Th\u1eddi gian \u1edf \u0111\u00e2y r\u1ea5t tr\u1ef1c di\u1ec7n: \u0111\u00f3 l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh ng\u00e2m. B\u1ea1n ki\u1ec3m so\u00e1t n\u00f3 kh\u00e1 tr\u1ef1c ti\u1ebfp b\u1eb1ng quy\u1ebft \u0111\u1ecbnh khi n\u00e0o th\u00ec nh\u1ea5n p\u00edt-t\u00f4ng ho\u1eb7c r\u00f3t c\u00e0 ph\u00ea ra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pha d\u00f2ng ch\u1ea3y qua (percolation)<\/strong> nh\u01b0 pour-over, m\u00e1y nh\u1ecf gi\u1ecdt hay b\u00ecnh Chemex l\u1ea1i v\u1eadn h\u00e0nh theo c\u01a1 ch\u1ebf kh\u00e1c. N\u01b0\u1edbc m\u1edbi li\u00ean t\u1ee5c di chuy\u1ec3n xuy\u00ean qua l\u1edbp b\u1ed9t, v\u00e0 th\u1eddi gian ti\u1ebfp x\u00fac th\u1ef1c ch\u1ea5t l\u00e0 kho\u1ea3ng th\u1eddi gian trung b\u00ecnh m\u00e0 m\u1ed9t ph\u00e2n t\u1eed n\u01b0\u1edbc b\u1ea5t k\u1ef3 ch\u1ea1m v\u00e0o b\u1ed9t c\u00e0 ph\u00ea tr\u01b0\u1edbc khi tho\u00e1t ra ngo\u00e0i. \u0110i\u1ec1u \u0111\u00f3 \u0111\u01b0\u1ee3c chi ph\u1ed1i g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n b\u1edfi t\u1ed1c \u0111\u1ed9 d\u00f2ng n\u01b0\u1edbc ch\u1ea3y qua l\u1edbp b\u1ed9t, v\u1ed1n ph\u1ee5 thu\u1ed9c v\u00e0o l\u1ef1c c\u1ea3n c\u1ee7a c\u1ee1 xay v\u00e0 t\u1ed1c \u0111\u1ed9 r\u00f3t c\u1ee7a b\u1ea1n. B\u1ea1n kh\u00f4ng qu\u1ea3n l\u00fd m\u1ed9t m\u1ebb ng\u00e2m; b\u1ea1n \u0111ang \u0111i\u1ec1u ph\u1ed1i m\u1ed9t d\u00f2ng ch\u1ea3y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Espresso th\u1ec3 hi\u1ec7n r\u00f5 r\u1ec7t nh\u1ea5t t\u00ednh ph\u1ee5 thu\u1ed9c n\u00e0y. Kh\u00f4ng c\u00f3 chi\u1ebfc m\u00e1y pha espresso n\u00e0o c\u00f3 n\u00fam xoay &#8220;th\u1eddi gian chi\u1ebft xu\u1ea5t&#8221;. B\u1ea1n ch\u1ec9nh c\u1ee1 xay m\u1ecbn h\u01a1n ho\u1eb7c th\u00f4 h\u01a1n, \u0111i\u1ec1u \u0111\u00f3 l\u00e0m thay \u0111\u1ed5i l\u1ef1c c\u1ea3n c\u1ee7a b\u00e1nh c\u00e0 ph\u00ea, l\u00e0m thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y, t\u1eeb \u0111\u00f3 t\u1ea1o ra m\u1ed9t shot espresso ch\u1ea3y nhanh h\u01a1n ho\u1eb7c ch\u1eadm h\u01a1n. Khung th\u1eddi gian m\u1ee5c ti\u00eau 25\u201330 gi\u00e2y l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a vi\u1ec7c b\u1ea1n l\u00e0m \u0111\u00fang t\u1ea5t c\u1ea3 c\u00e1c kh\u00e2u kh\u00e1c, ch\u1ee9 kh\u00f4ng ph\u1ea3i nguy\u00ean nh\u00e2n t\u1ea1o n\u00ean ch\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u r\u00f5 s\u1ef1 ph\u1ee5 thu\u1ed9c l\u1eabn nhau n\u00e0y l\u00e0 n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i c\u1ee7a m\u1ecdi k\u1ef9 thu\u1eadt pha ch\u1ebf chuy\u00ean nghi\u1ec7p:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;Trong qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea, c\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh c\u00f3 m\u1ed1i quan h\u1ec7 ph\u1ee5 thu\u1ed9c l\u1eabn nhau m\u1eadt thi\u1ebft. Do \u0111\u00f3, r\u1ea5t kh\u00f3 \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh b\u1ea5t k\u1ef3 y\u1ebfu t\u1ed1 \u0111\u01a1n l\u1ebb n\u00e0o m\u00e0 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c sau \u0111\u00f3. Ch\u1eb3ng h\u1ea1n, trong pha espresso, vi\u1ec7c thay \u0111\u1ed5i ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t xay s\u1ebd l\u00e0m thay \u0111\u1ed5i \u00e1p su\u1ea5t chi\u1ebft xu\u1ea5t, t\u1eeb \u0111\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y v\u00e0 th\u1eddi gian ti\u1ebfp x\u00fac.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u2014 <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1878450X20300267\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Nghi\u00ean c\u1ee9u v\u1ec1 Chi\u1ebft xu\u1ea5t C\u00e0 ph\u00ea, <em>ScienceDirect<\/em><\/strong><\/u><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u1ed3ng h\u1ed3 chi\u1ebft xu\u1ea5t: T\u1ea1i sao th\u1eddi gian l\u1ea1i mang h\u01b0\u01a1ng v\u1ecb?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t tu\u1ea7n t\u1ef1 bi\u1ebfn th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a c\u00e0 ph\u00ea th\u00e0nh m\u1ed9t chu\u1ed7i h\u01b0\u01a1ng v\u1ecb n\u1ed1i ti\u1ebfp: n\u01b0\u1edbc h\u00f2a tan c\u00e1c h\u1ee3p ch\u1ea5t kh\u00e1c nhau ra kh\u1ecfi b\u1ed9t c\u00e0 ph\u00ea theo m\u1ed9t th\u1ee9 t\u1ef1 c\u1ed1 \u0111\u1ecbnh, v\u00e0 th\u1eddi \u0111i\u1ec3m b\u1ea1n d\u1eebng chu\u1ed7i \u0111\u00f3 l\u1ea1i ch\u00ednh l\u00e0 nh\u1eefng g\u00ec \u0111\u1ecdng l\u1ea1i trong t\u00e1ch c\u1ee7a b\u1ea1n. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng di\u1ec5n ra ng\u1eabu nhi\u00ean. Ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc di\u1ec5n ti\u1ebfn theo m\u1ed9t l\u1ecbch tr\u00ecnh d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, v\u00e0 th\u1eddi gian l\u00e0 c\u00f4ng c\u1ee5 duy nh\u1ea5t quy\u1ebft \u0111\u1ecbnh b\u1ea1n s\u1ebd d\u1eebng l\u1ea1i \u1edf ga n\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3n ch\u1ea5t c\u1ed1t l\u00f5i n\u1eb1m \u1edf \u0111\u00e2y: c\u00e1c h\u1ee3p ch\u1ea5t h\u00f2a tan trong c\u00e0 ph\u00ea kh\u00f4ng tan v\u1edbi c\u00f9ng m\u1ed9t t\u1ed1c \u0111\u1ed9. M\u1ed9t s\u1ed1 ch\u1ea5t nh\u1eb9 v\u00e0 h\u00e1o h\u1ee9c (ch\u00fang h\u00f2a tan v\u00e0o n\u01b0\u1edbc g\u1ea7n nh\u01b0 t\u1ee9c th\u00ec). Nh\u1eefng ch\u1ea5t kh\u00e1c n\u1eb7ng h\u01a1n, li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd h\u01a1n v\u1edbi c\u1ea5u tr\u00fac th\u00e0nh t\u1ebf b\u00e0o, v\u00e0 c\u1ea7n th\u1eddi gian ph\u01a1i nhi\u1ec5m l\u00e2u h\u01a1n tr\u01b0\u1edbc khi gi\u1ea3i ph\u00f3ng. N\u01b0\u1edbc kh\u00f4ng h\u1ec1 quan t\u00e2m \u0111\u1ebfn s\u1edf th\u00edch h\u01b0\u01a1ng v\u1ecb c\u1ee7a b\u1ea1n. N\u00f3 ch\u1ec9 l\u1ea7n l\u01b0\u1ee3t \u0111i qua h\u00e0ng \u0111\u1ee3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0ng \u0111\u1ee3i \u0111\u00f3 di\u1ec5n ra \u0111\u1ea1i kh\u00e1i nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Axit tr\u00e1i c\u00e2y v\u00e0 h\u01b0\u01a1ng th\u01a1m nh\u1eb9<\/strong> h\u00f2a tan \u0111\u1ea7u ti\u00ean. \u0110\u00e2y l\u00e0 nh\u1eefng n\u1ed1t h\u01b0\u01a1ng thanh s\u00e1ng, v\u1ecb cam chanh v\u00e0 \u0111\u00f4i khi l\u00e0 h\u01b0\u01a1ng hoa khi\u1ebfn cho m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea chi\u1ebft xu\u1ea5t chu\u1ea9n m\u1ef1c tr\u1edf n\u00ean s\u1ed1ng \u0111\u1ed9ng. Ch\u00fang c\u00f3 \u0111\u1ed9 h\u00f2a tan r\u1ea5t cao v\u00e0 di chuy\u1ec3n c\u1ef1c nhanh.<\/li>\n\n\n\n<li><strong>\u0110\u01b0\u1eddng v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t Maillard<\/strong> xu\u1ea5t hi\u1ec7n ti\u1ebfp theo (nh\u1eefng n\u1ed1t caramel, s\u00f4-c\u00f4-la v\u00e0 m\u00f9i b\u00e1nh m\u00ec n\u01b0\u1edbng mang l\u1ea1i th\u1ec3 ch\u1ea5t \u0111\u1ea7m d\u00e0y c\u00f9ng v\u1ecb ng\u1ecdt cho t\u00e1ch c\u00e0 ph\u00ea). C\u00e1c ch\u1ea5t n\u00e0y c\u1ea7n nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 k\u00e9o ra, v\u00e0 \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao th\u1eddi gian pha d\u00e0i h\u01a1n m\u1ed9t ch\u00fat th\u01b0\u1eddng cho v\u1ecb \u0111\u1eadm \u0111\u00e0, phong ph\u00fa h\u01a1n.<\/li>\n\n\n\n<li><strong>Ch\u1ea5t ch\u00e1t tannin v\u00e0 ch\u1ea5t h\u1eefu c\u01a1 n\u1eb7ng<\/strong> \u0111\u1ebfn cu\u1ed1i c\u00f9ng. \u0110\u00e2y l\u00e0 nh\u1eefng h\u1ee3p ch\u1ea5t ch\u1ecbu tr\u00e1ch nhi\u1ec7m cho v\u1ecb \u0111\u1eafng g\u1eaft, v\u1ecb ch\u00e1t kh\u00f4 v\u00e0 c\u1ea3m gi\u00e1c se r\u00e1t b\u00e1m l\u1ea1i \u1edf cu\u1ed1ng h\u1ecdng. Ch\u00fang l\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n b\u1ea1n kh\u00f4ng bao gi\u1edd mu\u1ed1n xu\u1ea5t hi\u1ec7n qu\u00e1 nhi\u1ec1u.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-time-flavor-order-683x1024.webp\" alt=\"An infographic titled The Extraction Clock explaining coffee flavor order from fruit acids to sugars and tannins, featuring extraction yield percentages from under-extracted to over-extracted.\" class=\"wp-image-49543\" title=\"\" srcset=\"https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-time-flavor-order-683x1024.webp 683w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-time-flavor-order-200x300.webp 200w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-time-flavor-order-768x1152.webp 768w, https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-extraction-time-flavor-order.webp 1024w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ecnh t\u1ef1 \u0111\u00f3 gi\u1ea3i th\u00edch t\u1ea1i sao th\u1eddi gian pha qu\u00e1 ng\u1eafn l\u1ea1i t\u1ea1o ra v\u1ecb chua g\u1eaft. D\u1eebng l\u1ea1i qu\u00e1 s\u1edbm, b\u1ea1n m\u1edbi ch\u1ec9 thu \u0111\u01b0\u1ee3c ph\u1ea7n l\u1edbn l\u00e0 axit tr\u00e1i c\u00e2y (s\u00e1ng v\u1ecb, \u0111\u00fang, nh\u01b0ng m\u1ea5t c\u00e2n b\u1eb1ng). Thi\u1ebfu \u0111i l\u01b0\u1ee3ng \u0111\u01b0\u1eddng v\u00e0 h\u1ee3p ch\u1ea5t Maillard \u0111\u1ec3 l\u00e0m tr\u00f2n \u0111\u1ea7y, t\u00e1ch c\u00e0 ph\u00ea s\u1ebd c\u00f3 v\u1ecb lo\u00e3ng, chua g\u1eaft, \u0111\u00f4i khi h\u01a1i m\u1eb7n ch\u00e1t, v\u00e0 h\u1eadu v\u1ecb tr\u00f4i tu\u1ed9t r\u1ea5t nhanh. \u0110\u00f3 l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi (under-extraction) &#8211; kh\u00f4ng ph\u1ea3i m\u1ed9t phong c\u00e1ch h\u01b0\u01a1ng v\u1ecb, m\u00e0 l\u00e0 m\u1ed9t s\u1ef1 d\u1edf dang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00e9o d\u00e0i th\u1eddi gian qu\u00e1 m\u1ee9c, tannin s\u1ebd chi\u1ebfm l\u0129nh ho\u00e0n to\u00e0n. T\u00e1ch c\u00e0 ph\u00ea tr\u1edf n\u00ean \u0111\u1eafng ngh\u00e9t, r\u1ed7ng ru\u1ed9t v\u00e0 th\u00f4 r\u00e1p. V\u1ecb ng\u1ecdt t\u1eebng hi\u1ec7n di\u1ec7n tr\u01b0\u1edbc \u0111\u00f3 b\u1ecb ch\u00f4n v\u00f9i ho\u00e0n to\u00e0n d\u01b0\u1edbi l\u1edbp v\u1ecb ch\u00e1t kh\u00f4. \u0110\u00f3 l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c (over-extraction) &#8211; th\u00eam th\u1eddi gian kh\u00f4ng l\u00e0m cho n\u00f3 \u0111\u1eadm ngon h\u01a1n, m\u00e0 ch\u1ec9 ti\u1ebfp t\u1ee5c l\u00f4i ra nh\u1eefng h\u1ee3p ch\u1ea5t m\u00e0 b\u1ea1n kh\u00f4ng h\u1ec1 mong mu\u1ed1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khung m\u1ee5c ti\u00eau thu tr\u1ecdn nh\u1eefng th\u00e0nh ph\u1ea7n tinh t\u00fay m\u00e0 kh\u00f4ng b\u01b0\u1edbc ch\u00e2n v\u00e0o v\u00f9ng \u0111\u1eafng ch\u00e1t n\u1eb1m \u1edf kho\u1ea3ng <strong>t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t (extraction yield) t\u1eeb 18\u201322%<\/strong>, ngh\u0129a l\u00e0 18\u201322% kh\u1ed1i l\u01b0\u1ee3ng b\u1ed9t c\u00e0 ph\u00ea kh\u00f4 th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c h\u00f2a tan v\u00e0o trong n\u01b0\u1edbc. D\u01b0\u1edbi ng\u01b0\u1ee1ng \u0111\u00f3, b\u1ea1n b\u1ecb chi\u1ebft xu\u1ea5t thi\u1ebfu. Tr\u00ean ng\u01b0\u1ee1ng \u0111\u00f3, b\u1ea1n \u0111\u00e3 \u0111i qu\u00e1 xa. N\u1ed3ng \u0111\u1ed9 \u0111\u1eadm nh\u1ea1t (strength) l\u00e0 bi\u1ebfn s\u1ed1 ri\u00eang bi\u1ec7t \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1edfi t\u1ef7 l\u1ec7 c\u00e0 ph\u00ea v\u00e0 n\u01b0\u1edbc, nh\u01b0ng t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh t\u00e1ch c\u00e0 ph\u00ea c\u00f3 c\u00e2n b\u1eb1ng hay b\u1ecb ph\u00e1 h\u1ecfng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u khi\u1ebfn cu\u1ed9c ch\u01a1i n\u00e0y tr\u1edf n\u00ean \u0111\u1ea7y c\u0103ng th\u1eb3ng trong th\u1ef1c t\u1ebf l\u00e0 ranh gi\u1edbi gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i \u0111\u00f3 mong manh \u0111\u1ebfn m\u1ee9c n\u00e0o. V\u1edbi pour-over, ch\u1ec9 ch\u00eanh l\u1ec7ch 15\u201320 gi\u00e2y c\u00f3 th\u1ec3 bi\u1ebfn m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea t\u1eeb thanh ng\u1ecdt, r\u1ea1ng r\u1ee1 th\u00e0nh m\u1ed9t t\u00e1ch ph\u1eb3ng l\u1eb7ng, kh\u00f4 \u0111\u1eafng. B\u1ea1n kh\u00f4ng n\u00f3i v\u1ec1 kho\u1ea3ng c\u00e1ch v\u00e0i ph\u00fat, b\u1ea1n \u0111ang n\u00f3i v\u1ec1 kho\u1ea3ng c\u00e1ch gi\u1eefa m\u1ed9t m\u1ebb pha xu\u1ea5t s\u1eafc v\u00e0 m\u1ed9t m\u1ebb pha h\u1ecfng ch\u1ec9 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u1ed9 d\u00e0i c\u1ee7a m\u1ed9t ti\u1ebfng chu\u00f4ng th\u00f4ng b\u00e1o \u0111i\u1ec7n tho\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00f3 ch\u00ednh l\u00e0 s\u1ee9c n\u1eb7ng th\u1ef1c s\u1ef1 c\u1ee7a th\u1eddi gian ti\u1ebfp x\u00fac trong pha c\u00e0 ph\u00ea. N\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t c\u00e0i \u0111\u1eb7t b\u1ea1n ch\u1ec9nh m\u1ed9t l\u1ea7n l\u00e0 xong. N\u00f3 l\u00e0 chi\u1ebfc \u0111\u1ed3ng h\u1ed3 \u0111ang ch\u1ea1y xuy\u00ean qua m\u1ed9t chu\u1ed7i h\u01b0\u01a1ng v\u1ecb, v\u00e0 m\u1ecdi bi\u1ebfn s\u1ed1 trong m\u1ebb pha \u0111\u1ec1u t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi \u0111i\u1ec3m chi\u1ebfc \u0111\u1ed3ng h\u1ed3 \u0111\u00f3 d\u1eebng l\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u1ee1 xay \u0111\u1ecbnh h\u00ecnh th\u1eddi gian ti\u1ebfp x\u00fac nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ee1 xay ki\u1ec3m so\u00e1t th\u1eddi gian ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp h\u01a1n b\u1ea5t k\u1ef3 bi\u1ebfn s\u1ed1 n\u00e0o kh\u00e1c m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 can thi\u1ec7p, v\u00e0 n\u00f3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3 th\u00f4ng qua hai c\u01a1 ch\u1ebf ri\u00eang bi\u1ec7t v\u1eadn h\u00e0nh \u0111\u1ed3ng th\u1eddi. Khi b\u1ea1n xay m\u1ecbn h\u01a1n, b\u1ea1n l\u00e0m t\u0103ng t\u1ed5ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac: nhi\u1ec1u th\u00e0nh t\u1ebf b\u00e0o c\u00e0 ph\u00ea ph\u01a1i ra tr\u01b0\u1edbc n\u01b0\u1edbc h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c c\u00e1c ch\u1ea5t h\u00f2a tan gi\u1ea3i ph\u00f3ng nhanh h\u01a1n. Nh\u01b0ng \u0111\u1ed3ng th\u1eddi, b\u1ea1n c\u0169ng n\u00e9n ch\u1eb7t l\u1edbp b\u1ed9t c\u00e0 ph\u00ea l\u1ea1i, bu\u1ed9c n\u01b0\u1edbc ph\u1ea3i ch\u1eadt v\u1eadt h\u01a1n \u0111\u1ec3 len l\u1ecfi qua. L\u1ef1c c\u1ea3n \u0111\u00f3 ch\u00ednh l\u00e0 th\u1ee9 k\u00e9o d\u00e0i th\u1eddi gian pha c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hai t\u00e1c \u0111\u1ed9ng n\u00e0y c\u00f9ng k\u00e9o v\u1ec1 m\u1ed9t h\u01b0\u1edbng, \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u1ee1 xay l\u1ea1i c\u00f3 s\u1ee9c \u1ea3nh h\u01b0\u1edfng m\u1ea1nh m\u1ebd \u0111\u1ebfn v\u1eady. Xay th\u00f4 h\u01a1n s\u1ebd m\u1edf r\u1ed9ng kho\u1ea3ng c\u00e1ch l\u1edbp b\u1ed9t, n\u01b0\u1edbc ch\u1ea3y qua nhanh h\u01a1n, v\u00e0 th\u1eddi gian ti\u1ebfp x\u00fac gi\u1ea3m xu\u1ed1ng. Xay m\u1ecbn h\u01a1n s\u1ebd b\u1ecbt k\u00edn c\u00e1c kho\u1ea3ng tr\u1ed1ng, n\u01b0\u1edbc ch\u1ea3y ch\u1eadm l\u1ea1i, v\u00e0 th\u1eddi gian ti\u1ebfp x\u00fac t\u0103ng l\u00ean. Trong ph\u01b0\u01a1ng ph\u00e1p pha d\u00f2ng ch\u1ea3y qua (pour-over, m\u00e1y nh\u1ecf gi\u1ecdt, espresso), l\u1edbp b\u1ed9t c\u00e0 ph\u00ea \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t m\u00f4i tr\u01b0\u1eddng x\u1ed1p, v\u00e0 l\u1ef1c c\u1ea3n d\u00f2ng ch\u1ea3y c\u1ee7a n\u00f3 ch\u00ednh l\u00e0 \u0111\u1ed9ng c\u01a1 th\u00fac \u0111\u1ea9y chi\u1ebfc \u0111\u1ed3ng h\u1ed3 chi\u1ebft xu\u1ea5t c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u01a1 ch\u1ebf \u0111\u1ed9 th\u1ea5m, kh\u00f4ng ph\u1ea3i k\u00edch th\u01b0\u1edbc l\u1ed7 tho\u00e1t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 n\u01a1i m\u1ed9t quan ni\u1ec7m sai l\u1ea7m dai d\u1eb3ng th\u01b0\u1eddng g\u00e2y t\u1ed1n k\u00e9m ti\u1ec1n b\u1ea1c. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi pha \u0111\u1ed5 l\u1ed7i cho t\u1ed1c \u0111\u1ed9 ch\u1ea3y ch\u1eadm l\u00e0 do thi\u1ebft k\u1ebf c\u1ee7a ph\u1ec5u (kh\u00f4ng \u0111\u1ee7 l\u1ed7 tho\u00e1t, l\u1ed7 tho\u00e1t qu\u00e1 nh\u1ecf). C\u00e1c l\u1ed7 tho\u00e1t ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 l\u1ed1i ra. N\u01b0\u1edbc \u0111\u00e3 ph\u1ea3i d\u00e0nh g\u1ea7n nh\u01b0 to\u00e0n b\u1ed9 th\u1eddi gian di chuy\u1ec3n \u0111\u1ec3 chi\u1ebfn \u0111\u1ea5u v\u01b0\u1ee3t qua l\u1edbp b\u1ed9t c\u00e0 ph\u00ea t\u1eeb r\u1ea5t l\u00e2u tr\u01b0\u1edbc khi n\u00f3 ch\u1ea1m t\u1edbi c\u00e1c l\u1ed7 \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ee9 th\u1ef1c s\u1ef1 chi ph\u1ed1i d\u00f2ng ch\u1ea3y l\u00e0 <strong>\u0111\u1ed9 th\u1ea5m (permeability)<\/strong> c\u1ee7a l\u1edbp b\u1ed9t c\u00e0 ph\u00ea \u0111\u00f3 &#8211; s\u1ea3n ph\u1ea9m t\u1ea1o n\u00ean t\u1eeb c\u1ee1 xay, h\u00ecnh d\u1ea1ng h\u1ea1t b\u1ed9t v\u00e0 c\u00e1ch c\u00e1c h\u1ea1t b\u1ed9t n\u00e9n l\u1ea1i v\u1edbi nhau. C\u1ea5u tr\u00fac h\u00ecnh h\u1ecdc c\u1ee7a l\u1ed7 tho\u00e1t ph\u1ec5u v\u1ec1 c\u01a1 b\u1ea3n kh\u00f4ng c\u00f3 \u00fd ngh\u0129a \u0111\u1ed1i v\u1edbi th\u1eddi gian pha c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 kinh nghi\u1ec7m truy\u1ec1n mi\u1ec7ng c\u1ee7a c\u00e1c barista. M\u1ed9t nghi\u00ean c\u1ee9u ph\u1ea3n bi\u1ec7n khoa h\u1ecdc c\u00f4ng b\u1ed1 tr\u00ean <a href=\"https:\/\/royalsocietypublishing.org\/rsos\/article\/13\/4\/252031\/481206\/A-model-for-the-permeability-of-coffee-pucks\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Royal Society Open Science<\/strong><\/u><\/a> \u0111\u00e3 \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c d\u1ea1ng Forchheimer (d\u1ef1a tr\u00ean \u0111\u1ecbnh lu\u1eadt Darcy) \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a d\u00f2ng n\u01b0\u1edbc ch\u1ea3y qua b\u00e1nh c\u00e0 ph\u00ea n\u00e9n, sau \u0111\u00f3 x\u00e1c th\u1ef1c b\u1eb1ng h\u00ecnh \u1ea3nh ch\u1ee5p X-quang. C\u00e1c ph\u00e1t hi\u1ec7n r\u1ea5t r\u00f5 r\u00e0ng: xay m\u1ecbn h\u01a1n t\u1ea1o ra c\u00e1c khoang r\u1ed7ng nh\u1ecf h\u01a1n v\u00e0 l\u00e0m gi\u1ea3m \u0111\u1ed9 th\u1ea5m m\u1ed9t c\u00e1ch \u0111\u00e1ng k\u1ec3, nh\u00e2n l\u00ean g\u1ea5p b\u1ed9i l\u1ef1c c\u1ea3n th\u1ee7y l\u1ef1c qua l\u1edbp b\u1ed9t. L\u1ef1c c\u1ea3n do c\u00e1c l\u1ed7 tho\u00e1t c\u1ee7a ph\u1ec5u g\u00e2y ra nh\u1ecf h\u01a1n v\u00e0i b\u1eadc \u0111\u1ed9 l\u1edbn so v\u1edbi l\u1ef1c c\u1ea3n c\u1ee7a ch\u00ednh l\u1edbp b\u1ed9t c\u00e0 ph\u00ea. L\u1edbp b\u1ed9t lu\u00f4n lu\u00f4n l\u00e0 n\u00fat th\u1eaft c\u1ed5 chai duy nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1i nh\u00ecn s\u00e2u s\u1eafc n\u00e0y h\u01b0\u1edbng s\u1ef1 ch\u00fa \u00fd c\u1ee7a b\u1ea1n v\u1ec1 \u0111\u00fang n\u01a1i n\u00f3 thu\u1ed9c v\u1ec1 (ch\u1ea5t l\u01b0\u1ee3ng m\u00e1y xay v\u00e0 k\u1ef9 thu\u1eadt d\u00e0n ph\u1eb3ng b\u1ec1 m\u1eb7t b\u1ed9t) thay v\u00ec b\u1eadn t\u00e2m v\u00e0o c\u00e1c bi\u1ebfn s\u1ed1 thi\u1ebft b\u1ecb v\u1ed1n kh\u00f4ng h\u1ec1 l\u00e0m d\u1ecbch chuy\u1ec3n k\u1ebft qu\u1ea3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Espresso v\u00e0 Pour-Over: C\u00f9ng \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd, kh\u00e1c bi\u1ec7t khung th\u1eddi gian<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee9c \u0111\u1ed9 r\u1ee7i ro th\u1ef1c t\u1ebf tr\u00f4ng c\u00f3 v\u1ebb kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ph\u00e1p pha, nh\u01b0ng c\u01a1 ch\u1ebf n\u1ec1n t\u1ea3ng b\u00ean d\u01b0\u1edbi ho\u00e0n to\u00e0n \u0111\u1ed3ng nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong pha espresso, b\u1ea1n l\u00e0m vi\u1ec7c trong m\u1ed9t khung th\u1eddi gian c\u1ef1c ng\u1eafn ch\u1ec9 20\u201330 gi\u00e2y. <a href=\"https:\/\/perfectdailygrind.com\/2022\/12\/the-relationship-between-grind-size-and-coffee-extraction\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Gi\u00e1o s\u01b0 Chahan Yeretzian<\/strong><\/u><\/a>, Tr\u01b0\u1edfng Trung t\u00e2m C\u00e0 ph\u00ea Xu\u1ea5t s\u1eafc t\u1ea1i \u0110\u1ea1i h\u1ecdc Khoa h\u1ecdc \u1ee8ng d\u1ee5ng Zurich (ZHAW), gi\u1ea3i th\u00edch tr\u1ef1c di\u1ec7n:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;Khi chi\u1ebft xu\u1ea5t espresso trong m\u00f4i tr\u01b0\u1eddng qu\u00e1n c\u00e0 ph\u00ea, c\u1ea7n c\u1ee1 xay m\u1ecbn h\u01a1n \u0111\u1ec3 t\u1ea1o ra nhi\u1ec1u \u00e1p su\u1ea5t h\u01a1n b\u00ean trong tay pha (portafilter). \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ea1o ra nhi\u1ec1u l\u1ef1c c\u1ea3n h\u01a1n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 chi\u1ebft xu\u1ea5t chu\u1ea9n x\u00e1c. Tuy nhi\u00ean, tr\u00ean l\u00fd thuy\u1ebft, n\u1ebfu b\u1ea1n xay m\u1ecbn h\u01a1n th\u00ec b\u1ea1n s\u1ebd t\u0103ng \u00e1p su\u1ea5t v\u00e0 t\u1ef7 l\u1ec7 chi\u1ebft xu\u1ea5t, nh\u01b0ng x\u00e9t cho c\u00f9ng lu\u00f4n c\u00f3 m\u1ed9t m\u1ee9c tr\u1ea7n chi\u1ebft xu\u1ea5t t\u1ed1i \u0111a. N\u1ebfu b\u1ea1n xay qu\u00e1 m\u1ecbn, t\u1ed1c \u0111\u1ed9 d\u00f2ng n\u01b0\u1edbc s\u1ebd gi\u1ea3m v\u00ec l\u1ef1c c\u1ea3n qu\u00e1 l\u1edbn, v\u00e0 n\u00f3 th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh (channeling).&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh (channeling) l\u00e0 d\u1ea1ng l\u1ed7i khi n\u01b0\u1edbc t\u00ecm con \u0111\u01b0\u1eddng c\u00f3 \u00edt l\u1ef1c c\u1ea3n nh\u1ea5t \u0111\u1ec3 ch\u1ea3y qua b\u00e1nh c\u00e0 ph\u00ea thay v\u00ec th\u1ea5m \u0111\u1ec1u qua n\u00f3, m\u1ed9t h\u1ec7 qu\u1ea3 tr\u1ef1c ti\u1ebfp t\u1eeb vi\u1ec7c \u0111\u1ed9 th\u1ea5m gi\u1ea3m xu\u1ed1ng qu\u00e1 th\u1ea5p khi\u1ebfn ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t kho\u00e9t s\u00e2u v\u00e0o c\u00e1c \u0111i\u1ec3m y\u1ebfu trong b\u00e1nh c\u00e0 ph\u00ea. Th\u1eddi gian ti\u1ebfp x\u00fac ng\u1eebng \u0111\u1ed3ng \u0111\u1ec1u tr\u00ean to\u00e0n b\u1ed9 l\u1edbp b\u1ed9t, v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng chi\u1ebft xu\u1ea5t l\u1eadp t\u1ee9c s\u1ee5p \u0111\u1ed5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour-over v\u1eadn h\u00e0nh \u1edf quy m\u00f4 \u00eam d\u1ecbu h\u01a1n, v\u1edbi khung th\u1eddi gian b\u1eaft \u0111\u1ea7u t\u1eeb 3\u20135 ph\u00fat, nh\u01b0ng m\u1ed1i quan h\u1ec7 gi\u1eefa c\u1ee1 xay v\u00e0 \u0111\u1ed9 th\u1ea5m v\u1eabn l\u00e0 c\u00f9ng m\u1ed9t n\u00fam \u0111i\u1ec1u ch\u1ec9nh. Xay qu\u00e1 th\u00f4, n\u01b0\u1edbc lao qua qu\u00e1 nhanh tr\u01b0\u1edbc khi chi\u1ebft xu\u1ea5t k\u1ecbp x\u1ea3y ra. Xay qu\u00e1 m\u1ecbn, b\u1ea1n ph\u1ea3i ch\u1edd \u0111\u1ee3i b\u1ed1n ph\u00fat cho m\u1ed9t d\u00f2ng ch\u1ea3y l\u1ebd ra ch\u1ec9 m\u1ea5t hai ph\u00fat, li\u00ean t\u1ee5c k\u00e9o ra c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u1eafng ch\u00e1t trong su\u1ed1t th\u1eddi gian \u0111\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00ed carbon dioxide \u0111\u00f3ng vai tr\u00f2 \u1edf \u0111\u00e2u?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t bi\u1ebfn s\u1ed1 th\u1ef1c s\u1ef1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ch\u1ea3y ban \u0111\u1ea7u (nh\u01b0ng hay b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi c\u1ee1 xay) l\u00e0 l\u01b0\u1ee3ng kh\u00ed CO\u2082 c\u00f2n gi\u1eef l\u1ea1i trong c\u00e1c h\u1ea1t c\u00e0 ph\u00ea m\u1edbi rang. C\u00e0 ph\u00ea m\u1edbi rang th\u1ea3i kh\u00ed carbon dioxide, v\u00e0 trong giai \u0111o\u1ea1n \u1ee7 n\u1edf (bloom), l\u01b0\u1ee3ng kh\u00ed \u0111\u00f3 t\u1ea1o ra \u00e1p su\u1ea5t ng\u01b0\u1ee3c b\u00ean trong l\u1edbp b\u1ed9t, t\u1ea1m th\u1eddi l\u00e0m ch\u1eadm s\u1ef1 th\u1ea5u su\u1ed1t c\u1ee7a n\u01b0\u1edbc. \u0110i\u1ec1u n\u00e0y ho\u00e0n to\u00e0n c\u00f3 th\u1eadt, v\u00e0 n\u00f3 c\u00f3 th\u1ec3 khi\u1ebfn m\u1ed9t g\u00f3i c\u00e0 ph\u00ea m\u1edbi rang h\u00e0nh x\u1eed kh\u00e1c h\u1eb3n so v\u1edbi ch\u00ednh nh\u1eefng h\u1ea1t c\u00e0 ph\u00ea \u0111\u00f3 sau hai tu\u1ea7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0ng \u0111\u00f3 ch\u1ec9 l\u00e0 t\u00e1c \u0111\u1ed9ng th\u1ee9 c\u1ea5p. CO\u2082 ti\u00eau tan nhanh ch\u00f3ng, v\u00e0 m\u1ed9t khi giai \u0111o\u1ea1n \u1ee7 n\u1edf l\u1eafng xu\u1ed1ng, \u0111\u1ed9 th\u1ea5m &#8211; do c\u1ee1 xay ki\u1ec3m so\u00e1t &#8211; s\u1ebd l\u1ea5y l\u1ea1i to\u00e0n quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a b\u1ea1n. N\u1ebfu th\u1eddi gian ch\u1ea3y c\u1ee7a b\u1ea1n li\u00ean t\u1ee5c b\u1ecb l\u1ec7ch, h\u00e3y nh\u00ecn v\u00e0o m\u00e1y xay tr\u01b0\u1edbc khi nh\u00ecn v\u00e0o ng\u00e0y rang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ee1 xay l\u00e0 \u0111\u00f2n b\u1ea9y r\u00f5 nh\u1ea5t v\u00ec \u0111\u00f3 l\u00e0 c\u00e1ch tr\u1ef1c ti\u1ebfp nh\u1ea5t \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh l\u1ea1i \u0111\u1ed9 th\u1ea5m c\u1ee7a l\u1edbp b\u1ed9t. Nh\u01b0ng \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 chi\u1ebfc kim duy nh\u1ea5t tr\u00ean \u0111\u1ed3ng h\u1ed3, v\u00e0 y\u1ebfu t\u1ed1 ti\u1ebfp theo l\u00e0 \u0111i\u1ec1u m\u00e0 h\u1ea7u h\u1ebft c\u00e1c ng\u01b0\u1eddi pha c\u00f3 kinh nghi\u1ec7m hi\u1ebfm khi ngh\u0129 t\u1edbi cho \u0111\u1ebfn khi c\u00f3 \u0111i\u1ec1u g\u00ec \u0111\u00f3 b\u1ea5t th\u01b0\u1eddng x\u1ea3y ra.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00e1c \u0111\u1ed9ng ng\u1ea7m c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc l\u00e0m \u0111\u01b0\u1ee3c nhi\u1ec1u \u0111i\u1ec1u h\u01a1n l\u00e0 ch\u1ec9 \u0111i\u1ec1u ch\u1ec9nh h\u00f3a h\u1ecdc chi\u1ebft xu\u1ea5t: n\u00f3 l\u00e0m bi\u1ebfn \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 di chuy\u1ec3n c\u1ee7a n\u01b0\u1edbc qua l\u1edbp b\u1ed9t c\u00e0 ph\u00ea v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, v\u00e0 ri\u00eang s\u1ef1 d\u1ecbch chuy\u1ec3n \u0111\u00f3 \u0111\u00e3 c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i th\u1eddi gian pha ngay c\u1ea3 khi b\u1ea1n ch\u01b0a h\u1ec1 ch\u1ea1m tay v\u00e0o m\u00e1y xay.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c h\u01b0\u1edbng d\u1eabn pha ch\u1ebf \u0111\u1ec1u coi d\u1ea3i nhi\u1ec7t \u0111\u1ed9 kho\u1ea3ng 91\u201396\u00b0C nh\u01b0 m\u1ed9t b\u00e0i to\u00e1n thu\u1ea7n h\u00f3a h\u1ecdc: n\u01b0\u1edbc n\u00f3ng h\u01a1n h\u00f2a tan nhi\u1ec1u ch\u1ea5t h\u01a1n, n\u01b0\u1edbc m\u00e1t h\u01a1n h\u00f2a tan \u00edt h\u01a1n. \u0110i\u1ec1u \u0111\u00f3 \u0111\u00fang. Nh\u01b0ng c\u00f3 m\u1ed9t t\u00e1c \u0111\u1ed9ng c\u01a1 h\u1ecdc v\u1eadn h\u00e0nh ng\u1ea7m b\u00ean d\u01b0\u1edbi ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc \u0111\u00f3, v\u00e0 n\u00f3 g\u1ea7n nh\u01b0 kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c nh\u1eafc \u0111\u1ebfn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ed9 nh\u1edbt: T\u1ea1i sao n\u01b0\u1edbc n\u00f3ng di chuy\u1ec3n kh\u00e1c bi\u1ec7t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 nh\u1edbt (viscosity) \u0111\u01a1n gi\u1ea3n l\u00e0 l\u1ef1c c\u1ea3n n\u1ed9i t\u1ea1i c\u1ee7a ch\u1ea5t l\u1ecfng: m\u1ee9c \u0111\u1ed9 n\u00f3 ch\u1ed1ng l\u1ea1i d\u00f2ng ch\u1ea3y m\u1ea1nh \u0111\u1ebfn m\u1ee9c n\u00e0o. H\u00e3y ngh\u0129 v\u1ec1 m\u1eadt ong l\u1ea1nh so v\u1edbi m\u1eadt ong \u1ea5m. N\u01b0\u1edbc c\u0169ng ho\u1ea1t \u0111\u1ed9ng theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1, ch\u1ec9 \u1edf quy m\u00f4 m\u1eaft th\u01b0\u1eddng kh\u00f4ng nh\u00ecn th\u1ea5y. N\u01b0\u1edbc n\u00f3ng h\u01a1n s\u1ebd lo\u00e3ng h\u01a1n, \u00edt l\u1ef1c c\u1ea3n h\u01a1n, v\u00e0 lu\u1ed3n l\u00e1ch qua c\u00e1c khe h\u1edf h\u1eb9p nhanh h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng con s\u1ed1 \u0111\u1eb1ng sau \u0111i\u1ec1u n\u00e0y kh\u00f4ng h\u1ec1 nh\u1ecf. Theo <a href=\"https:\/\/iapws.org\/documents\/release\/viscosity\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>C\u00f4ng th\u1ee9c IAPWS 2008<\/strong><\/u><\/a> v\u1ec1 \u0110\u1ed9 nh\u1edbt c\u1ee7a N\u01b0\u1edbc th\u00f4ng th\u01b0\u1eddng, \u0111\u1ed9 nh\u1edbt \u0111\u1ed9ng l\u1ef1c c\u1ee7a n\u01b0\u1edbc gi\u1ea3m t\u1eeb <strong>1,0016 mPa\u00b7s \u1edf 20\u00b0C (nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng)<\/strong> xu\u1ed1ng c\u00f2n <strong>0,2987 mPa\u00b7s \u1edf 93\u00b0C (g\u1ea7n s\u00f4i)<\/strong>, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng m\u1ee9c <strong>gi\u1ea3m kho\u1ea3ng 70%<\/strong>. \u0110\u00f3 kh\u00f4ng ph\u1ea3i sai s\u1ed1 l\u00e0m tr\u00f2n. \u0110\u00f3 l\u00e0 vi\u1ec7c ch\u1ea5t l\u1ecfng tr\u1edf n\u00ean d\u1ec5 d\u00e0ng di chuy\u1ec3n h\u01a1n v\u1ec1 m\u1eb7t b\u1ea3n ch\u1ea5t xuy\u00ean qua l\u1edbp b\u1ed9t c\u00e0 ph\u00ea n\u00e9n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t kho\u1ea3ng 5\u00b0C l\u00e0m thay \u0111\u1ed5i t\u00e1ch c\u00e0 ph\u00ea c\u1ee7a b\u1ea1n ra sao<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 phi\u00ean b\u1ea3n th\u1ef1c t\u1ebf: h\u00e3y pha c\u00f9ng m\u1ed9t lo\u1ea1i c\u00e0 ph\u00ea, c\u00f9ng c\u1ee1 xay, c\u00f9ng \u0111\u1ecbnh l\u01b0\u1ee3ng, c\u00f9ng k\u1ef9 thu\u1eadt r\u00f3t, nh\u01b0ng thay n\u01b0\u1edbc 91\u00b0C b\u1eb1ng n\u01b0\u1edbc 96\u00b0C. M\u1ebb pha n\u00f3ng h\u01a1n s\u1ebd ch\u1ea3y nhanh h\u01a1n tr\u00f4ng th\u1ea5y. \u0110\u1ed9 nh\u1edbt th\u1ea5p h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi l\u1ef1c c\u1ea3n d\u00f2ng ch\u1ea3y qua l\u1edbp b\u1ed9t th\u1ea5p h\u01a1n, l\u00e0m r\u00fat ng\u1eafn th\u1eddi gian ti\u1ebfp x\u00fac, t\u1eeb \u0111\u00f3 l\u00e0m thay \u0111\u1ed5i nh\u1eefng ch\u1ea5t n\u00e0o \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t v\u00e0 theo t\u1ef7 l\u1ec7 n\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u c\u00f4ng b\u1ed1 tr\u00ean t\u1ea1p ch\u00ed <em>Foods<\/em> (MDPI, 2023) \u0111\u00e3 m\u00f4 t\u1ea3 c\u01a1 ch\u1ebf n\u00e0y tr\u1ef1c di\u1ec7n:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;Nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc cao h\u01a1n (T) l\u00e0m t\u0103ng \u0111\u1ed9 h\u00f2a tan c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 l\u00e0m gi\u1ea3m \u0111\u1ed9 nh\u1edbt c\u1ee7a n\u01b0\u1edbc [1]. Nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 nh\u1edbt v\u00e0 m\u1eadt \u0111\u1ed9 c\u1ee7a n\u01b0\u1edbc [1], \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i s\u1ef1 ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a \u00e1p su\u1ea5t v\u00e0 d\u00f2ng ch\u1ea3y trong b\u00e1nh c\u00e0 ph\u00ea [2], v\u00e0 t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 truy\u1ec1n kh\u1ed1i c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2014 <a href=\"https:\/\/www.mdpi.com\/2304-8158\/12\/15\/2871\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>C\u00e1c t\u00e1c gi\u1ea3, <em>Foods<\/em>, MDPI, 2023<\/strong><\/u><\/a><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ee5m t\u1eeb &#8220;s\u1ef1 ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a \u00e1p su\u1ea5t v\u00e0 d\u00f2ng ch\u1ea3y&#8221; mang s\u1ee9c n\u1eb7ng th\u1ef1c t\u1ebf r\u1ea5t l\u1edbn. N\u00f3 c\u00f3 ngh\u0129a l\u00e0 nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng ch\u1ec9 l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y trung b\u00ecnh, n\u00f3 c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i <em>v\u1ecb tr\u00ed<\/em> n\u01b0\u1edbc di chuy\u1ec3n qua b\u00e1nh c\u00e0 ph\u00ea, t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp tr\u1edf l\u1ea1i t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a th\u1eddi gian ti\u1ebfp x\u00fac.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ea9n \u0111o\u00e1n sai l\u1ea7m m\u00e0 h\u1ea7u h\u1ebft ng\u01b0\u1eddi pha m\u1eafc ph\u1ea3i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 n\u01a1i \u0111i\u1ec3m m\u00f9 xu\u1ea5t hi\u1ec7n. B\u1ea1n t\u0103ng nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc pha \u0111\u1ec3 kh\u1eafc ph\u1ee5c m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea chua g\u1eaft, chi\u1ebft xu\u1ea5t ch\u01b0a t\u1edbi. M\u1ebb pha ch\u1ea3y nhanh h\u01a1n. B\u1ea1n cho r\u1eb1ng m\u00e1y xay c\u1ee7a m\u00ecnh b\u1ecb l\u1ec7ch (c\u00f3 th\u1ec3 do \u0111\u1ed9 \u1ea9m, c\u00f3 th\u1ec3 do c\u00e0 ph\u00ea m\u1edbi) v\u00e0 b\u1ea1n ch\u1ec9nh m\u1ecbn h\u01a1n \u0111\u1ec3 b\u00f9 l\u1ea1i. L\u00fac n\u00e0y b\u1ea1n \u0111\u00e3 thay \u0111\u1ed5i hai bi\u1ebfn s\u1ed1 trong khi ch\u1ec9 c\u00f3 m\u1ed9t bi\u1ebfn s\u1ed1 th\u1ef1c s\u1ef1 l\u00e0 nguy\u00ean nh\u00e2n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u ng\u01b0\u1ee3c l\u1ea1i c\u0169ng x\u1ea3y ra: n\u01b0\u1edbc r\u00f3t ngu\u1ed9i h\u01a1n c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm d\u00f2ng ch\u1ea3y \u0111\u1ee7 \u0111\u1ec3 \u0111\u00e1nh l\u1eeba b\u1ea1n r\u1eb1ng c\u1ee1 xay \u0111ang qu\u00e1 m\u1ecbn. L\u1edbp b\u1ed9t kh\u00f4ng h\u1ec1 b\u1ecb n\u00e9n ch\u1eb7t h\u01a1n. Ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 n\u01b0\u1edbc \u0111ang \u0111\u1eb7c h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t khi b\u1ea1n hi\u1ec3u r\u1eb1ng \u0111\u1ed9 nh\u1edbt l\u00e0 m\u1ed9t l\u1ef1c c\u00f3 th\u1eadt, \u0111o l\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng l\u00ean th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a c\u00e0 ph\u00ea (\u0111\u1ed9c l\u1eadp v\u1edbi c\u1ee1 xay, \u0111\u1ecbnh l\u01b0\u1ee3ng v\u00e0 k\u1ef9 thu\u1eadt), b\u1ea1n s\u1ebd ng\u1eebng vi\u1ec7c \u0111u\u1ed5i theo c\u00e1c l\u1ed7i m\u00e1y xay \u1ea3o \u1ea3nh v\u00e0 b\u1eaft \u0111\u1ea7u \u0111\u1eb7t c\u00e2u h\u1ecfi \u0111\u00fang tr\u01b0\u1edbc ti\u00ean: <em>li\u1ec7u h\u00f4m nay nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc c\u1ee7a m\u00ecnh c\u00f3 thay \u0111\u1ed5i g\u00ec kh\u00f4ng?<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Khung th\u1eddi gian pha chu\u1ea9n cho t\u1eebng ph\u01b0\u01a1ng ph\u00e1p<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c kho\u1ea3ng th\u1eddi gian pha \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng cung c\u1ea5p cho b\u1ea1n m\u1ed9t m\u1ed1c \u0111\u1ed1i chi\u1ebfu kh\u1edfi \u0111\u1ea7u, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111\u00edch \u0111\u1ebfn cu\u1ed1i c\u00f9ng, v\u00e0 nh\u1eefng con s\u1ed1 n\u00e0y ch\u1ec9 th\u1ef1c s\u1ef1 c\u00f3 \u00fd ngh\u0129a khi b\u1ea1n hi\u1ec3u <em>t\u1ea1i sao<\/em> ch\u00fang l\u1ea1i kh\u00e1c bi\u1ec7t \u1edf t\u1eebng ph\u01b0\u01a1ng ph\u00e1p. M\u1ed9t b\u00ecnh French press ng\u00e2m trong b\u1ed1n ph\u00fat v\u1eabn cho v\u1ecb r\u1ea5t \u1ed5n. M\u1ed9t ph\u1ec5u V60 ch\u1ea3y k\u00e9o d\u00e0i b\u1ed1n ph\u00fat th\u01b0\u1eddng c\u00f3 v\u1ecb \u0111\u1eafng ng\u1eaft nh\u01b0 g\u1ea1t t\u00e0n \u01b0\u1edbt. C\u00f9ng m\u1ed9t h\u1ea1t c\u00e0 ph\u00ea, c\u00f9ng m\u1ed9t ngu\u1ed3n n\u01b0\u1edbc, k\u1ebft qu\u1ea3 ho\u00e0n to\u00e0n tr\u00e1i ng\u01b0\u1ee3c. C\u01a1 ch\u1ebf v\u1eadt l\u00fd \u0111\u1eb1ng sau t\u1eebng ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh l\u00e0 l\u1eddi gi\u1ea3i th\u00edch cho kho\u1ea3ng c\u00e1ch \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y n\u00eau r\u00f5 c\u00e1c d\u1ea3i th\u1eddi gian v\u1eadn h\u00e0nh v\u00e0 l\u00fd do t\u1ed3n t\u1ea1i c\u1ee7a t\u1eebng d\u1ea3i:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ph\u01b0\u01a1ng ph\u00e1p<\/th><th>Khung th\u1eddi gian pha \u0111i\u1ec3n h\u00ecnh<\/th><th>Nguy\u00ean l\u00fd v\u1eadt l\u00fd (L\u00fd do t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t)<\/th><\/tr><\/thead><tbody><tr><td>V60<\/td><td>2:15\u20133:30<\/td><td><strong>D\u00f2ng ch\u1ea3y qua (Percolation)<\/strong>: n\u01b0\u1edbc m\u1edbi li\u00ean t\u1ee5c di chuy\u1ec3n qua l\u1edbp b\u1ed9t. C\u1ee1 xay, t\u1ed1c \u0111\u1ed9 r\u00f3t v\u00e0 l\u1ef1c c\u1ea3n c\u1ee7a gi\u1ea5y l\u1ecdc c\u00f9ng chi ph\u1ed1i th\u1eddi gian n\u01b0\u1edbc ti\u1ebfp x\u00fac v\u1edbi b\u1ed9t c\u00e0 ph\u00ea.<\/td><\/tr><tr><td>French Press<\/td><td>4:00\u20138:00+<\/td><td><strong>Ng\u00e2m \u1ee7 (Immersion)<\/strong>: b\u1ed9t ng\u1eadp ho\u00e0n to\u00e0n trong n\u01b0\u1edbc. Qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t ch\u1eadm d\u1ea7n khi n\u01b0\u1edbc ti\u1ebfn g\u1ea7n \u0111\u1ebfn tr\u1ea1ng th\u00e1i b\u00e3o h\u00f2a (l\u1edbp b\u1ed9t kh\u00f4ng ph\u1ea3i ch\u1ed1ng l\u1ea1i dung m\u00f4i chuy\u1ec3n \u0111\u1ed9ng).<\/td><\/tr><tr><td>AeroPress<\/td><td>1:00\u20133:00<\/td><td><strong>Ng\u00e2m \u1ee7 k\u1ebft h\u1ee3p d\u00f2ng ch\u1ea3y c\u00f3 tr\u1ee3 l\u1ef1c \u00e1p su\u1ea5t<\/strong>: ng\u00e2m b\u00e3o h\u00f2a ho\u00e0n to\u00e0n, sau \u0111\u00f3 d\u00f9ng \u00e1p l\u1ef1c \u00e9p nhanh qua m\u00e0ng l\u1ecdc. Th\u1eddi gian ng\u1eafn v\u1eabn hi\u1ec7u qu\u1ea3 v\u00ec s\u1ef1 ti\u1ebfp x\u00fac ban \u0111\u1ea7u \u0111\u00e3 r\u1ea5t m\u00e3nh li\u1ec7t.<\/td><\/tr><tr><td>Espresso<\/td><td>25\u201335 gi\u00e2y<\/td><td><strong>D\u00f2ng ch\u1ea3y \u00e1p su\u1ea5t cao qua b\u00e1nh c\u00e0 ph\u00ea n\u00e9n ch\u1eb7t<\/strong>: xay c\u1ef1c m\u1ecbn, \u00e1p su\u1ea5t l\u1edbn v\u00e0 l\u1edbp b\u1ed9t n\u00e9n ch\u1eb7t t\u1ea1o ra s\u1ef1 chi\u1ebft xu\u1ea5t th\u1ea7n t\u1ed1c. Nh\u1eefng thay \u0111\u1ed5i nh\u1ecf l\u00e0m bi\u1ebfn chuy\u1ec3n th\u1eddi gian r\u1ea5t nhanh.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c bi\u1ec7t c\u01a1 h\u1ecdc c\u1ed1t l\u00f5i l\u00e0: ph\u01b0\u01a1ng ph\u00e1p d\u00f2ng ch\u1ea3y qua li\u00ean t\u1ee5c \u0111\u01b0a dung m\u00f4i m\u1edbi v\u00e0o, do \u0111\u00f3 \u0111\u1ed9 d\u1ed1c n\u1ed3ng \u0111\u1ed9 gi\u1eefa n\u01b0\u1edbc v\u00e0 b\u1ed9t c\u00e0 ph\u00ea lu\u00f4n gi\u1eef \u1edf m\u1ee9c cao trong su\u1ed1t qu\u00e1 tr\u00ecnh: vi\u1ec7c chi\u1ebft xu\u1ea5t kh\u00f4ng bao gi\u1edd t\u1ef1 ch\u1eadm l\u1ea1i. Ph\u01b0\u01a1ng ph\u00e1p ng\u00e2m \u1ee7 th\u00ec ng\u01b0\u1ee3c l\u1ea1i. M\u1ed9t khi n\u01b0\u1edbc xung quanh b\u1ed9t ti\u1ebfn d\u1ea7n \u0111\u1ebfn \u0111i\u1ec3m c\u00e2n b\u1eb1ng, t\u1ed1c \u0111\u1ed9 chi\u1ebft xu\u1ea5t s\u1ebd t\u1ef1 \u0111\u1ed9ng gi\u1ea3m xu\u1ed1ng r\u00f5 r\u1ec7t. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao French press c\u00f3 th\u1ec3 ng\u00e2m b\u1ed1n ph\u00fat m\u00e0 kh\u00f4ng b\u1ecb \u0111\u1eafng g\u1eaft, nh\u01b0ng ph\u1ec5u V60 ch\u1ea3y qu\u00e1 l\u00e2u th\u00ec h\u1ea7u nh\u01b0 lu\u00f4n lu\u00f4n b\u1ecb \u0111\u1eafng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.mdpi.com\/2079-9292\/9\/1\/100\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u c\u00f4ng b\u1ed1 tr\u00ean t\u1ea1p ch\u00ed <em>Electronics<\/em> (MDPI, 2020)<\/strong><\/u><\/a>, \u0111\u1ed1i chi\u1ebfu ch\u1ea5t l\u01b0\u1ee3ng espresso v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u00e1y pha d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n c\u1ee7a Hi\u1ec7p h\u1ed9i C\u00e0 ph\u00ea \u0110\u1eb7c s\u1ea3n Ch\u00e2u \u00c2u, \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh r\u00f5 r\u00e0ng:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;Th\u1eddi gian d\u00f2ng ch\u1ea3y c\u1ee7a espresso ph\u1ea3i \u1edf m\u1ee9c t\u1ed1i \u01b0u \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng c\u1ee7a h\u00e0ng tr\u0103m h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc b\u00ean trong n\u00f3. Espresso chi\u1ebft xu\u1ea5t qu\u00e1 nhanh s\u1ebd c\u00f3 th\u1ec3 ch\u1ea5t lo\u00e3ng v\u00e0 \u0111\u1ed9 chua g\u1eaft h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, th\u1eddi gian pha c\u00e0 ph\u00ea qu\u00e1 ch\u1eadm s\u1ebd d\u1eabn \u0111\u1ebfn m\u1ed9t t\u00e1ch c\u00e0 ph\u00ea \u0111\u1eafng ng\u1eaft v\u00e0 kh\u00f4 r\u00e1p.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Logic t\u01b0\u01a1ng t\u1ef1 \u00e1p d\u1ee5ng tr\u00ean m\u1ecdi ph\u01b0\u01a1ng ph\u00e1p pha &#8211; ch\u1ec9 l\u00e0 espresso l\u00e0m cho ranh gi\u1edbi \u0111\u00f3 hi\u1ec3n hi\u1ec7n r\u00f5 m\u1ed3n m\u1ed9t trong 30 gi\u00e2y thay v\u00ec 3 ph\u00fat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t chi ti\u1ebft v\u1ec1 th\u1eddi gian th\u01b0\u1eddng khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi b\u1ed1i r\u1ed1i: <strong>giai \u0111o\u1ea1n \u1ee7 (pre-infusion\/bloom) \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a c\u00e0 ph\u00ea.<\/strong> D\u00f9 b\u1ea1n \u0111ang \u1ee7 n\u1edf ph\u1ec5u V60 hay d\u00f9ng t\u00ednh n\u0103ng ng\u1eaft b\u01a1m tr\u00ean m\u00e1y pha, giai \u0111o\u1ea1n \u0111\u00f3 v\u1eabn \u0111ang chi\u1ebft xu\u1ea5t t\u00edch c\u1ef1c. \u0110i\u1ec1u quan tr\u1ecdng kh\u00f4ng ph\u1ea3i l\u00e0 b\u1ea1n ch\u1ecdn quy \u01b0\u1edbc b\u1ea5m gi\u1edd n\u00e0o (t\u1eeb gi\u1ecdt \u0111\u1ea7u ti\u00ean, t\u1eeb l\u00fac b\u01a1m ch\u1ea1y hay t\u1eeb l\u00fac r\u00f3t d\u00f2ng n\u01b0\u1edbc \u0111\u1ea7u), m\u00e0 l\u00e0 b\u1ea1n ph\u1ea3i ch\u1ecdn m\u1ed9t quy \u01b0\u1edbc v\u00e0 tu\u00e2n th\u1ee7 nh\u1ea5t qu\u00e1n. Vi\u1ec7c b\u1ea5m gi\u1edd thi\u1ebfu nh\u1ea5t qu\u00e1n s\u1ebd bi\u1ebfn nh\u1eadt k\u00fd pha ch\u1ebf c\u1ee7a b\u1ea1n th\u00e0nh m\u1edb th\u00f4ng tin nhi\u1ec5u lo\u1ea1n v\u00f4 gi\u00e1 tr\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng khung th\u1eddi gian n\u00e0y c\u0169ng d\u1ecbch chuy\u1ec3n t\u00f9y theo b\u1ea3n th\u00e2n h\u1ea1t c\u00e0 ph\u00ea. M\u1ed9t h\u1ea1t c\u00e0 ph\u00ea \u0111\u1eb7c, tr\u1ed3ng \u1edf \u0111\u1ed9 cao l\u1edbn s\u1ebd kh\u00e1ng chi\u1ebft xu\u1ea5t m\u1ea1nh h\u01a1n h\u1ea1t tr\u1ed3ng \u1edf v\u00f9ng th\u1ea5p. M\u1ed9t m\u1ee9c rang nh\u1ea1t c\u1ea7n nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 m\u1edf kh\u00f3a h\u01b0\u01a1ng v\u1ecb so v\u1edbi m\u1ee9c rang \u0111\u1eadm v\u1ed1n \u0111\u00e3 gi\u00f2n v\u00e0 x\u1ed1p v\u1ec1 m\u1eb7t c\u1ea5u tr\u00fac. H\u00e3y xem nh\u1eefng con s\u1ed1 nh\u01b0 m\u1ed9t \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n, sau \u0111\u00f3 \u0111\u1ec3 v\u1ecb gi\u00e1c c\u1ee7a b\u1ea1n v\u00e0 l\u0103ng k\u00ednh ch\u1ea9n \u0111o\u00e1n \u1edf ph\u1ea7n ti\u1ebfp theo ho\u00e0n t\u1ea5t c\u00f4ng vi\u1ec7c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1eddi gian pha nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ea9n \u0111o\u00e1n b\u1eb1ng th\u1eddi gian pha ph\u00e1t huy hi\u1ec7u qu\u1ea3 cao nh\u1ea5t khi b\u1ea1n ng\u1eebng coi con s\u1ed1 nh\u01b0 m\u1ed9t \u0111\u00edch \u0111\u1ebfn v\u00e0 b\u1eaft \u0111\u1ea7u coi n\u00f3 nh\u01b0 m\u1ed9t b\u1ea3n b\u00e1o c\u00e1o tri\u1ec7u ch\u1ee9ng. Th\u1eddi gian m\u1ebb pha ho\u00e0n t\u1ea5t kh\u00f4ng b\u1ea3o b\u1ea1n ph\u1ea3i <em>l\u00e0m g\u00ec<\/em>, n\u00f3 cho b\u1ea1n bi\u1ebft \u0111i\u1ec1u g\u00ec <em>\u0111\u00e3 x\u1ea3y ra<\/em>, v\u00e0 khi k\u1ebft h\u1ee3p v\u1edbi h\u01b0\u01a1ng v\u1ecb b\u1ea1n n\u1ebfm \u0111\u01b0\u1ee3c, n\u00f3 ch\u1ec9 th\u1eb3ng v\u00e0o gi\u1ea3i ph\u00e1p kh\u1eafc ph\u1ee5c. S\u1ef1 k\u1ebft h\u1ee3p \u0111\u00f3 ch\u00ednh l\u00e0 to\u00e0n b\u1ed9 quy chu\u1ea9n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 s\u1ef1 thay \u0111\u1ed5i trong quy tr\u00ecnh l\u00e0m vi\u1ec7c: n\u1ebfm tr\u01b0\u1edbc, nh\u00ecn gi\u1edd sau. Tr\u01b0\u1edbc khi b\u1ea1n nh\u00ecn v\u00e0o \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd, h\u00e3y nh\u1ea5p m\u1ed9t ng\u1ee5m. N\u00f3 c\u00f3 chua g\u1eaft v\u00e0 lo\u00e3ng kh\u00f4ng? C\u00f3 \u0111\u1eafng v\u00e0 kh\u00f4 r\u00e1p kh\u00f4ng? Hay c\u00e2n b\u1eb1ng ho\u00e0n h\u1ea3o? B\u00e2y gi\u1edd h\u00e3y nh\u00ecn v\u00e0o th\u1eddi gian. H\u01b0\u01a1ng v\u1ecb cho b\u1ea1n bi\u1ebft b\u1ea1n \u0111ang l\u1ec7ch v\u1ec1 <em>h\u01b0\u1edbng n\u00e0o<\/em>; th\u1eddi gian x\u00e1c nh\u1eadn <em>l\u00fd do t\u1ea1i sao<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quy t\u1eafc \u0111i\u1ec1u ch\u1ec9nh c\u1ee1 xay th\u1ef1c s\u1ef1 chu\u1ea9n x\u00e1c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t khi b\u1ea1n c\u00f3 c\u1ea3 hai \u0111i\u1ec3m d\u1eef li\u1ec7u, vi\u1ec7c kh\u1eafc ph\u1ee5c tr\u1edf n\u00ean mang t\u00ednh c\u01a1 h\u1ecdc thu\u1ea7n t\u00fay. \u0110\u00e2y kh\u00f4ng ph\u1ea3i nh\u1eefng quy t\u1eafc c\u1ea7n h\u1ecdc v\u1eb9t, ch\u00fang l\u00e0 k\u1ebft qu\u1ea3 logic c\u1ee7a vi\u1ec7c hi\u1ec3u r\u00f5 th\u1eddi gian ti\u1ebfp x\u00fac t\u00e1c \u0111\u1ed9ng th\u1ebf n\u00e0o \u0111\u1ebfn chu\u1ed7i chi\u1ebft xu\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Espresso d\u01b0\u1edbi 20 gi\u00e2y, v\u1ecb chua g\u1eaft<\/strong> \u2192 xay m\u1ecbn h\u01a1n. N\u01b0\u1edbc ch\u1ea3y qu\u00e1 nhanh, axit \u0111\u00e3 h\u00f2a tan nh\u01b0ng \u0111\u01b0\u1eddng ch\u01b0a k\u1ecbp theo sau.<\/li>\n\n\n\n<li><strong>Espresso tr\u00ean 30 gi\u00e2y, v\u1ecb \u0111\u1eafng ch\u00e1t<\/strong> \u2192 xay th\u00f4 h\u01a1n. N\u01b0\u1edbc b\u1ecb gi\u1eef l\u1ea1i qu\u00e1 l\u00e2u v\u00e0 k\u00e9o theo c\u1ea3 nh\u1eefng h\u1ee3p ch\u1ea5t x\u1ea5u ph\u00eda sau.<\/li>\n\n\n\n<li><strong>Pour-over d\u01b0\u1edbi 2:30, v\u1ecb nh\u1ea1t ho\u1eb7c chua<\/strong> \u2192 xay m\u1ecbn h\u01a1n ho\u1eb7c r\u00f3t ch\u1eadm l\u1ea1i. L\u1edbp b\u1ed9t r\u00fat h\u1ebft n\u01b0\u1edbc tr\u01b0\u1edbc khi s\u1ef1 chi\u1ebft xu\u1ea5t k\u1ecbp ho\u00e0n t\u1ea5t.<\/li>\n\n\n\n<li><strong>Pour-over tr\u00ean 3:30, v\u1ecb \u0111\u1eafng ho\u1eb7c kh\u00f4 r\u00e1p<\/strong> \u2192 xay th\u00f4 h\u01a1n. L\u1ef1c c\u1ea3n qu\u00e1 l\u1edbn v\u00e0 b\u1ea1n \u0111ang chi\u1ebft xu\u1ea5t qu\u00e1 \u0111\u00e0 ph\u1ea7n \u0111u\u00f4i.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Logic lu\u00f4n lu\u00f4n \u0111\u1ed3ng nh\u1ea5t: \u0111\u1ed9 l\u1ec7ch th\u1eddi gian + \u0111\u1eb7c t\u00ednh h\u01b0\u01a1ng v\u1ecb = v\u1ecb tr\u00ed chi\u1ebft xu\u1ea5t. B\u1ea1n ch\u1ec9 \u0111ang \u0111\u1ecdc xem m\u00ecnh \u0111\u00e3 r\u01a1i v\u00e0o \u0111i\u1ec3m n\u00e0o tr\u00ean \u0111\u01b0\u1eddng cong chi\u1ebft xu\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ecbnh l\u01b0\u1ee3ng v\u00e0 giai \u0111o\u1ea1n \u1ee7 n\u1edf nh\u01b0 nh\u1eefng \u0111\u00f2n b\u1ea9y th\u1ee9 c\u1ea5p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ec9nh c\u1ee1 xay l\u00e0 \u0111\u00f2n b\u1ea9y m\u1ea1nh nh\u1ea5t, nh\u01b0ng kh\u00f4ng ph\u1ea3i duy nh\u1ea5t. <strong>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ecbnh l\u01b0\u1ee3ng (dose)<\/strong> quan tr\u1ecdng h\u01a1n h\u1ea7u h\u1ebft ng\u01b0\u1eddi pha nh\u1eadn \u0111\u1ecbnh, \u0111\u1eb7c bi\u1ec7t trong pha espresso. N\u1ebfu b\u1ea1n t\u0103ng l\u01b0\u1ee3ng b\u1ed9t c\u00e0 ph\u00ea trong khi gi\u1eef nguy\u00ean l\u01b0\u1ee3ng n\u01b0\u1edbc, b\u1ea1n \u0111ang t\u0103ng th\u00eam l\u1ef1c c\u1ea3n c\u1ee7a b\u00e1nh c\u00e0 ph\u00ea, l\u00e0m ch\u1eadm d\u00f2ng ch\u1ea3y v\u00e0 t\u0103ng th\u1eddi gian ti\u1ebfp x\u00fac m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ed5i c\u1ee1 xay. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a n\u1ebfu shot c\u1ee7a b\u1ea1n ch\u1ea3y h\u01a1i nhanh m\u1ed9t ch\u00fat v\u00e0 b\u1ea1n kh\u00f4ng mu\u1ed1n ch\u1ec9nh m\u1ecbn h\u01a1n n\u1eefa (c\u00f3 th\u1ec3 b\u1ea1n \u0111\u00e3 ch\u1ea1m t\u1edbi gi\u1edbi h\u1ea1n m\u00e1y xay), vi\u1ec7c th\u00eam n\u1eeda gam b\u1ed9t c\u00f3 th\u1ec3 l\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ef9 thu\u1eadt \u1ee7 n\u1edf (bloom)<\/strong> l\u00e0 n\u01a1i s\u1ef1 bi\u1ebfn thi\u00ean th\u1eddi gian v\u00f4 \u00fd th\u01b0\u1eddng \u00e2m th\u1ea7m len l\u1ecfi v\u00e0o. C\u00e0 ph\u00ea m\u1edbi rang ch\u1ee9a nhi\u1ec1u CO\u2082 s\u1ebd n\u1edf r\u1ea5t m\u1ea1nh: n\u1ebfu b\u1ea1n kh\u00f4ng cho ch\u00fang kho\u1ea3ng th\u1eddi gian \u1ed5n \u0111\u1ecbnh t\u1eeb 30\u201345 gi\u00e2y \u0111\u1ec3 tho\u00e1t kh\u00ed tr\u01b0\u1edbc khi r\u00f3t ch\u00ednh, l\u01b0\u1ee3ng kh\u00ed tho\u00e1t ra trong l\u00fac chi\u1ebft xu\u1ea5t s\u1ebd t\u1ea1o ra c\u00e1c r\u00e3nh d\u00f2ng ch\u1ea3y v\u00e0 t\u1ed1c \u0111\u1ed9 r\u00fat n\u01b0\u1edbc kh\u00f4ng \u0111\u1ec1u. S\u1ef1 bi\u1ebfn thi\u00ean \u0111\u00f3 hi\u1ec3n hi\u1ec7n th\u00e0nh th\u1eddi gian pha thi\u1ebfu nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c l\u1ea7n pha ngay c\u1ea3 khi b\u1ea1n kh\u00f4ng thay \u0111\u1ed5i b\u1ea5t k\u1ef3 \u0111i\u1ec1u g\u00ec kh\u00e1c. M\u1ed9t giai \u0111o\u1ea1n \u1ee7 \u0111\u1ec1u \u0111\u1eb7n, gi\u1ed1ng nhau m\u1ed7i l\u1ea7n, s\u1ebd lo\u1ea1i b\u1ecf th\u00eam m\u1ed9t m\u1eaft x\u00edch b\u1ea5t \u1ed5n kh\u1ecfi h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Logic t\u01b0\u01a1ng t\u1ef1 \u00e1p d\u1ee5ng cho k\u1ef9 thu\u1eadt r\u00f3t. M\u1ed9t d\u00f2ng r\u00f3t v\u1ed9i v\u00e3 ho\u1eb7c kh\u00f4ng \u0111\u1ec1u s\u1ebd l\u00e0m x\u00e1o tr\u1ed9n l\u1edbp b\u1ed9t, t\u1ea1o ra c\u00e1c \u0111i\u1ec3m l\u1ef1c c\u1ea3n c\u1ee5c b\u1ed9, v\u00e0 l\u00e0m th\u1eddi gian b\u1ecb tr\u00f4i d\u1ea1t theo nh\u1eefng c\u00e1ch kh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn c\u1ee1 xay hay \u0111\u1ecbnh l\u01b0\u1ee3ng. K\u1ef9 thu\u1eadt r\u00f3t \u00eam \u00e1i, nh\u1ea5t qu\u00e1n ch\u00ednh l\u00e0 th\u1ee9 gi\u00fap cho c\u00e1c con s\u1ed1 th\u1eddi gian c\u1ee7a b\u1ea1n tr\u1edf n\u00ean <em>\u0111\u00e1ng tin c\u1eady<\/em> ngay t\u1eeb \u0111\u1ea7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1ef1 \u1ed5n \u0111\u1ecbnh th\u1eddi gian nh\u01b0 m\u1ed9t ch\u1ec9 b\u00e1o ch\u1ea5t l\u01b0\u1ee3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 s\u1ee9c m\u1ea1nh ch\u1ea9n \u0111o\u00e1n v\u01b0\u1ee3t xa vi\u1ec7c s\u1eeda t\u1eebng t\u00e1ch c\u00e0 ph\u00ea l\u1ed7i \u0111\u01a1n l\u1ebb. H\u00e3y theo d\u00f5i th\u1eddi gian pha c\u1ee7a b\u1ea1n trong m\u1ed7i l\u1ea7n pha (kh\u00f4ng ph\u1ea3i \u0111\u1ec3 s\u0103n \u0111u\u1ed5i m\u1ed9t m\u1ee5c ti\u00eau c\u1ee9ng nh\u1eafc, m\u00e0 \u0111\u1ec3 ph\u00e1t hi\u1ec7n <em>s\u1ef1 tr\u00f4i d\u1ea1t<\/em>). N\u1ebfu d\u00f2ng ch\u1ea3y V60 c\u1ee7a b\u1ea1n \u0111\u1ec1u \u0111\u1eb7n \u1edf m\u1ee9c 2:45 su\u1ed1t hai tu\u1ea7n v\u00e0 h\u00f4m nay \u0111\u1ed9t ng\u1ed9t nh\u1ea3y l\u00ean 3:20 m\u00e0 b\u1ea1n kh\u00f4ng h\u1ec1 c\u1ed1 \u00fd thay \u0111\u1ed5i g\u00ec, ch\u1eafc ch\u1eafn c\u00f3 \u0111i\u1ec1u g\u00ec \u0111\u00f3 trong h\u1ec7 th\u1ed1ng \u0111\u00e3 d\u1ecbch chuy\u1ec3n. Nh\u1eefng th\u1ee7 ph\u1ea1m ti\u1ec1m n\u0103ng: m\u00e1y xay b\u1ecb tr\u00f4i c\u1ee1 do m\u00f2n l\u01b0\u1ee1i, gi\u1ea5y l\u1ecdc kh\u00f4ng \u0111\u01b0\u1ee3c \u00e1p s\u00e1t th\u00e0nh ph\u1ec5u, ho\u1eb7c m\u1ed9t g\u00f3i c\u00e0 ph\u00ea m\u1edbi c\u00f3 \u0111\u1ed9 \u0111\u1eb7c kh\u00e1c bi\u1ec7t h\u00e0nh x\u1eed kh\u00e1c trong l\u1edbp b\u1ed9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n \u0111\u00e3 b\u1eaft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 \u0111\u00f3 <em>tr\u01b0\u1edbc khi<\/em> b\u1ea1n n\u1ebfm t\u00e1ch c\u00e0 ph\u00ea. \u0110\u00f3 ch\u00ednh l\u00e0 vi\u1ec7c ch\u1ea9n \u0111o\u00e1n th\u1eddi gian pha \u1edf c\u1ea5p \u0111\u1ed9 cao nh\u1ea5t: kh\u00f4ng ph\u1ea3i m\u1ed9t m\u1ee5c ti\u00eau g\u1eafn li\u1ec1n v\u1edbi v\u1ecb gi\u00e1c, m\u00e0 l\u00e0 h\u1ec7 th\u1ed1ng c\u1ea3nh b\u00e1o s\u1edbm cho to\u00e0n b\u1ed9 quy tr\u00ecnh c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.baristamagazine.com\/changing-espresso-extraction-with-scott-rao\/\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Scott Rao, chuy\u00ean gia t\u01b0 v\u1ea5n c\u00e0 ph\u00ea<\/strong><\/u><\/a> v\u00e0 t\u00e1c gi\u1ea3 v\u1edbi h\u01a1n 25 n\u0103m kinh nghi\u1ec7m trong ng\u00e0nh, \u0111\u00e3 \u0111\u00fac k\u1ebft nguy\u00ean l\u00fd n\u1ec1n t\u1ea3ng m\u1ed9t c\u00e1ch m\u1ed9c m\u1ea1c:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;D\u1eef li\u1ec7u v\u00e0 ph\u1ea3n h\u1ed3i l\u00e0 y\u1ebfu t\u1ed1 s\u1ed1ng c\u00f2n \u0111\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t chuy\u00ean gia c\u00e0 ph\u00ea gi\u1ecfi h\u01a1n. Ch\u1ec9 v\u00ec b\u1ea1n chi\u1ebft xu\u1ea5t ba shot li\u00ean ti\u1ebfp \u0111\u1ec1u \u0111\u1ea1t \u0111\u00fang 30 gi\u00e2y kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a \u0111\u00f3 l\u00e0 c\u00f9ng m\u1ed9t shot gi\u1ed1ng nhau. Ch\u00fang ta c\u00f3 th\u1ec3 nh\u00ecn v\u00e0o d\u1eef li\u1ec7u v\u00e0 d\u00f9ng n\u00f3 l\u00e0m ph\u1ea3n h\u1ed3i \u0111\u1ec3 ho\u00e0n thi\u1ec7n b\u1ea3n th\u00e2n h\u01a1n.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Ba m\u1ed1c th\u1eddi gian gi\u1ed1ng h\u1ec7t nhau c\u00f3 th\u1ec3 che gi\u1ea5u ba shot ho\u00e0n to\u00e0n kh\u00e1c nhau: c\u00e1c ki\u1ec3u t\u1ea1o r\u00e3nh kh\u00e1c nhau, \u0111\u01b0\u1eddng cong nhi\u1ec7t kh\u00e1c nhau, s\u1ef1 ph\u00e2n b\u1ed5 b\u1ed9t kh\u00e1c nhau. S\u1ef1 \u1ed5n \u0111\u1ecbnh th\u1eddi gian qua nhi\u1ec1u <em>tu\u1ea7n<\/em> th\u01b0\u1eddng c\u00f3 \u00fd ngh\u0129a l\u1edbn h\u01a1n vi\u1ec7c ch\u1ea1m \u0111\u00fang m\u1ed9t con s\u1ed1 l\u00fd t\u01b0\u1edfng \u0111\u01a1n l\u1ebb, b\u1edfi v\u00ec n\u00f3 cho b\u1ea1n bi\u1ebft to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng (m\u00e1y xay, \u1ea5m r\u00f3t, k\u1ef9 thu\u1eadt) \u0111\u1ec1u \u0111ang n\u1eb1m trong t\u1ea7m ki\u1ec3m so\u00e1t. Th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a c\u00e0 ph\u00ea b\u1edbt \u0111i vai tr\u00f2 m\u1ed9t m\u1ee5c ti\u00eau v\u00e0 tr\u1edf th\u00e0nh m\u1ed9t t\u1ea5m g\u01b0\u01a1ng ph\u1ea3n chi\u1ebfu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Video d\u01b0\u1edbi \u0111\u00e2y ghi l\u1ea1i m\u1ed9t barista x\u1eed l\u00fd ch\u00ednh x\u00e1c quy tr\u00ecnh n\u00e0y trong th\u1eddi gian th\u1ef1c: ch\u1ea9n \u0111o\u00e1n m\u1ed9t shot ch\u1ea3y qu\u00e1 nhanh, \u0111i\u1ec1u ch\u1ec9nh c\u1ee1 xay v\u00e0 quan s\u00e1t ph\u1ea3n \u1ee9ng c\u1ee7a th\u1eddi gian. V\u00f2ng l\u1eb7p ph\u1ea3n h\u1ed3i di\u1ec5n ra nhanh h\u01a1n b\u1ea5t k\u1ef3 c\u00f4ng th\u1ee9c n\u00e0o c\u00f3 th\u1ec3 m\u00f4 t\u1ea3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Video:<\/strong> <a href=\"https:\/\/www.youtube.com\/watch?v=4RVnnbJU-zc\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>Ng\u1eebng ch\u1ea1y theo th\u1eddi gian chi\u1ebft xu\u1ea5t: B\u1ea1n \u0111ang c\u0103n ch\u1ec9nh Espresso sai c\u00e1ch<\/strong><\/u><\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Stop Chasing Shot Time \u2014 You\u2019re Dialing In Espresso Wrong\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/4RVnnbJU-zc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">V\u01b0\u1ee3t ra ngo\u00e0i c\u00e1c quy t\u1eafc c\u1ed1 \u0111\u1ecbnh: Cu\u1ed9c t\u00ecm ki\u1ebfm m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u01b0a c\u00f3 b\u1ea5t k\u1ef3 m\u1ed9t c\u00f4ng th\u1ee9c v\u1ea1n n\u0103ng, m\u1ea1ch l\u1ea1c n\u00e0o t\u1ed3n t\u1ea1i (k\u1ec3 c\u1ea3 trong c\u00e1c c\u1ea9m nang th\u1ef1c h\u00e0nh, trong t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt hay b\u1ea5t k\u1ef3 \u0111\u00e2u trong ph\u1ea1m vi c\u00f4ng c\u1ed9ng) c\u00f3 th\u1ec3 nh\u1eadn l\u01b0\u1ee3ng b\u1ed9t, c\u1ee1 xay v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u1ea1n r\u1ed3i t\u00ednh ra th\u1eddi gian pha ch\u00ednh x\u00e1c tr\u01b0\u1edbc khi b\u1ea1n ch\u1ea1m tay v\u00e0o \u1ea5m \u0111un. Kho\u1ea3ng tr\u1ed1ng \u0111\u00f3 l\u00e0 c\u00f3 th\u1eadt, v\u00e0 r\u1ea5t \u0111\u00e1ng \u0111\u1ec3 hi\u1ec3u t\u1ea1i sao n\u00f3 l\u1ea1i ngoan c\u1ed1 \u0111\u1ebfn v\u1eady.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh lu\u1eadt v\u1eadt l\u00fd kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u b\u00ed \u1ea9n. \u0110\u1ecbnh lu\u1eadt Darcy (Q = kA\u0394p \/ (\u03bcL)) m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c c\u00e1ch n\u01b0\u1edbc di chuy\u1ec3n qua m\u1ed9t l\u1edbp x\u1ed1p. T\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y b\u1eb1ng \u0111\u1ed9 th\u1ea5m nh\u00e2n di\u1ec7n t\u00edch m\u1eb7t c\u1eaft nh\u00e2n ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t, chia cho \u0111\u1ed9 nh\u1edbt nh\u00e2n \u0111\u1ed9 d\u00e0y l\u1edbp b\u1ed9t. M\u1ecdi bi\u1ebfn s\u1ed1 trong th\u1eddi gian ti\u1ebfp x\u00fac c\u1ee7a c\u00e0 ph\u00ea \u0111\u1ec1u n\u1eb1m \u1edf \u0111\u00e2u \u0111\u00f3 trong ph\u01b0\u01a1ng tr\u00ecnh \u0111\u00f3. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf <em>k<\/em>, h\u1ec7 s\u1ed1 \u0111\u1ed9 th\u1ea5m. N\u00f3 thay \u0111\u1ed5i theo t\u1eebng g\u00f3i c\u00e0 ph\u00ea b\u1ea1n m\u1edf. M\u1ee9c rang l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 gi\u00f2n c\u1ee7a h\u1ea1t, l\u00e0m thay \u0111\u1ed5i c\u00e1ch m\u00e1y xay l\u00e0m v\u1ee1 h\u1ea1t, t\u1eeb \u0111\u00f3 thay \u0111\u1ed5i s\u1ef1 ph\u00e2n b\u1ed1 h\u00ecnh d\u1ea1ng h\u1ea1t trong l\u1edbp b\u1ed9t. \u0110\u1ed9 \u0111\u1eb7c c\u1ee7a h\u1ea1t thay \u0111\u1ed5i theo xu\u1ea5t x\u1ee9, \u0111\u1ed9 cao v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ebf bi\u1ebfn. \u0110\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed l\u00e0m b\u1ed9t m\u1ecbn v\u00f3n c\u1ee5c kh\u00e1c nhau gi\u1eefa m\u1ed9t bu\u1ed5i s\u00e1ng m\u01b0a \u1ea9m v\u00e0 m\u1ed9t bu\u1ed5i chi\u1ec1u hanh kh\u00f4. M\u1ed9t m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n x\u00e2y d\u1ef1ng tr\u00ean m\u1ed9t g\u00f3i c\u00e0 ph\u00ea Ethiopia s\u01a1 ch\u1ebf \u01b0\u1edbt rang s\u00e1ng m\u00e0u s\u1ebd cho ra nh\u1eefng con s\u1ed1 v\u00f4 ngh\u0129a ngay kho\u1ea3nh kh\u1eafc b\u1ea1n chuy\u1ec3n sang m\u1ed9t g\u00f3i Brazil s\u01a1 ch\u1ebf t\u1ef1 nhi\u00ean rang \u0111\u1eadm, h\u1ea1t \u0111\u1eb7c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c t\u00e1c gi\u1ea3 c\u1ee7a b\u00e0i t\u1ed5ng quan ph\u1ea3n bi\u1ec7n khoa h\u1ecdc <a href=\"https:\/\/www.mdpi.com\/2076-3417\/13\/4\/2688\" rel=\"nofollow noopener\" target=\"_blank\"><u><strong>M\u00f4 h\u00ecnh th\u1ea5m tr\u00ean m\u00e1y t\u00ednh cho c\u00e0 ph\u00ea Espresso<\/strong><\/u><\/a> tr\u00ean t\u1ea1p ch\u00ed <em>Applied Sciences<\/em> (MDPI, 2023) \u0111\u00e3 ch\u1ec9 r\u00f5:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;C\u00e1c kh\u00eda c\u1ea1nh h\u00f3a h\u1ecdc v\u00e0 v\u1eadt l\u00fd trong chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea v\u00f4 c\u00f9ng ph\u1ee9c t\u1ea1p, do \u0111\u00f3 vi\u1ec7c m\u00f4 t\u1ea3 ho\u00e0n ch\u1ec9nh m\u1ed9t qu\u00e1 tr\u00ecnh nh\u01b0 v\u1eady b\u1eb1ng m\u1ed9t m\u00f4 h\u00ecnh to\u00e1n h\u1ecdc l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c to l\u1edbn.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e0 \u0111\u00e2y l\u00e0 nh\u1eefng nh\u00e0 nghi\u00ean c\u1ee9u \u0111ang x\u00e2y d\u1ef1ng c\u00e1c m\u00f4 h\u00ecnh \u0111i\u1ec7n to\u00e1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u1eefng ng\u01b0\u1eddi pha t\u1ea1i nh\u00e0 \u0111ang nh\u00ecn \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd. N\u1ebfu c\u1ed9ng \u0111\u1ed3ng h\u1ecdc thu\u1eadt c\u00f2n ch\u01b0a kh\u1ecfa l\u1ea5p \u0111\u01b0\u1ee3c kho\u1ea3ng tr\u1ed1ng n\u00e0y, th\u00ec m\u1ed9t c\u00f4ng th\u1ee9c b\u1ecf t\u00fai cho c\u0103n b\u1ebfp s\u1ebd kh\u00f4ng th\u1ec3 s\u1edbm xu\u1ea5t hi\u1ec7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c c\u1ed9ng \u0111\u1ed3ng \u0111am m\u00ea, khao kh\u00e1t v\u1ec1 m\u1ed9t \u0111i\u1ec1u g\u00ec \u0111\u00f3 chu\u1ea9n x\u00e1c h\u01a1n l\u00e0 r\u1ea5t th\u1ef1c t\u1ebf. Ng\u01b0\u1eddi pha ch\u1ebf t\u1eebng y\u00eau c\u1ea7u m\u1ed9t quy t\u1eafc &#8220;gam tr\u00ean gi\u00e2y&#8221;: m\u1ed9t t\u1ef7 l\u1ec7 \u0111\u01a1n gi\u1ea3n g\u1eafn kh\u1ed1i l\u01b0\u1ee3ng c\u00e0 ph\u00ea v\u1edbi th\u1eddi gian pha k\u1ef3 v\u1ecdng. \u0110\u00f3 l\u00e0 m\u1ed9t mong mu\u1ed1n ch\u00ednh \u0111\u00e1ng. Nh\u1eefng g\u00ec c\u1ed9ng \u0111\u1ed3ng nh\u1eadn \u0111\u01b0\u1ee3c thay v\u00e0o \u0111\u00f3 l\u00e0 nh\u1eefng d\u1ea3i th\u1eddi gian \u0111\u1ecbnh t\u00ednh: 2:30\u20133:30 cho d\u00f2ng ch\u1ea3y qua, 3\u20135 ph\u00fat cho ng\u00e2m \u1ee7. Nh\u1eefng lan can b\u1ea3o v\u1ec7 h\u1eefu \u00edch, nh\u01b0ng kh\u00f4ng ph\u1ea3i \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e0 m\u1ecdi ng\u01b0\u1eddi \u0111ang t\u00ecm ki\u1ebfm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 g\u00f3c nh\u00ecn m\u1edbi \u0111\u00e1ng \u0111\u1ec3 suy ng\u1eabm: s\u1ef1 v\u1eafng b\u00f3ng c\u1ee7a m\u1ed9t c\u00f4ng th\u1ee9c kh\u00f4ng ph\u1ea3i s\u1ef1 th\u1ea5t b\u1ea1i c\u1ee7a ng\u00e0nh c\u00e0 ph\u00ea. \u0110\u00f3 l\u00e0 t\u00edn hi\u1ec7u v\u1ec1 ch\u00ednh b\u1ea3n ch\u1ea5t c\u1ee7a th\u1eddi gian ti\u1ebfp x\u00fac trong pha c\u00e0 ph\u00ea. N\u00f3 l\u00e0 m\u1ed9t k\u1ebft qu\u1ea3 \u0111\u1ea7u ra c\u1ee7a h\u1ec7 th\u1ed1ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111\u1ea7u v\u00e0o. N\u00f3 xu\u1ea5t hi\u1ec7n t\u1eeb s\u1ef1 t\u01b0\u01a1ng t\u00e1c \u0111\u1ed3ng th\u1eddi gi\u1eefa c\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc, \u0111\u1ed9 th\u1ea5m, \u0111\u1ed9 \u0111\u1eb7c c\u1ee7a h\u1ea1t, m\u1ee9c \u0111\u1ed9 rang v\u00e0 c\u1ea5u tr\u00fac h\u00ecnh h\u1ecdc c\u1ee7a thi\u1ebft b\u1ecb: t\u1ea5t c\u1ea3 c\u00f9ng m\u1ed9t l\u00fac, t\u1ea5t c\u1ea3 c\u00f9ng t\u00e1c \u0111\u1ed9ng qua l\u1ea1i l\u1eabn nhau. M\u1ed9t ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01a1n l\u1ebb s\u1ebd ph\u1ea3i gi\u1eef y\u00ean t\u1ea5t c\u1ea3 nh\u1eefng y\u1ebfu t\u1ed1 \u0111\u00f3 c\u00f9ng l\u00fac, v\u00e0 c\u00e1c bi\u1ebfn s\u1ed1 \u0111\u00f3 \u0111\u01a1n gi\u1ea3n l\u00e0 kh\u00f4ng bao gi\u1edd ch\u1ecbu \u0111\u1ee9ng y\u00ean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a th\u1ef1c t\u1ebf l\u00e0: ng\u01b0\u1eddi pha ch\u1ebf n\u00e0o ch\u1edd \u0111\u1ee3i m\u1ed9t m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n l\u00e0 \u0111ang thu\u00ea ngo\u00e0i k\u1ef9 n\u0103ng c\u1ee7a m\u00ecnh cho m\u1ed9t c\u00f4ng c\u1ee5 ch\u01b0a h\u1ec1 t\u1ed3n t\u1ea1i. Ng\u01b0\u1eddi pha ch\u1ebf n\u00e0o th\u1ea5u su\u1ed1t <em>l\u00fd do t\u1ea1i sao<\/em> th\u1eddi gian ti\u1ebfp x\u00fac d\u1ecbch chuy\u1ec3n (hi\u1ec3u r\u1eb1ng xay th\u00f4 h\u01a1n l\u00e0m gi\u1ea3m l\u1ef1c c\u1ea3n v\u00e0 t\u0103ng t\u1ed1c d\u00f2ng ch\u1ea3y, n\u01b0\u1edbc n\u00f3ng h\u01a1n gi\u1ea3m \u0111\u1ed9 nh\u1edbt v\u00e0 ch\u1ea3y nhanh h\u01a1n, h\u1ea1t \u0111\u1eb7c h\u01a1n sinh ra h\u1ea1t c\u1ee9ng h\u01a1n xay kh\u00e1c \u0111i) &#8211; ng\u01b0\u1eddi pha \u0111\u00f3 \u0111\u00e3 s\u1edf h\u1eefu s\u1eb5n m\u00f4 h\u00ecnh trong tay. N\u00f3 n\u1eb1m trong t\u00e2m tr\u00ed h\u1ecd nh\u01b0 m\u1ed9t b\u1ea3n \u0111\u1ed3 nh\u00e2n qu\u1ea3, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t chi\u1ebfc m\u00e1y t\u00ednh b\u1ecf t\u00fai.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00f3 ch\u00ednh l\u00e0 s\u1ef1 ti\u1ebfn b\u1ed9 th\u1ef1c s\u1ef1 trong pha ch\u1ebf c\u00e0 ph\u00ea: t\u1eeb vi\u1ec7c tu\u00e2n theo c\u00e1c m\u1ed1c th\u1eddi gian c\u1ee9ng nh\u1eafc, \u0111\u1ebfn vi\u1ec7c th\u1ea5u hi\u1ec3u \u0111i\u1ec1u g\u00ec th\u00fac \u0111\u1ea9y ch\u00fang, v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 \u0111\u1ecdc m\u1ed9t \u0111\u1ed9 l\u1ec7ch th\u1eddi gian \u0111\u1ec3 bi\u1ebft ch\u00ednh x\u00e1c bi\u1ebfn s\u1ed1 n\u00e0o \u0111\u00e3 thay \u0111\u1ed5i. Chi\u1ebfc \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd th\u00f4i kh\u00f4ng c\u00f2n l\u00e0 m\u1ee5c ti\u00eau, m\u00e0 tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n. B\u1ea1n kh\u00f4ng c\u00f2n ch\u1ea1y theo m\u1ed9t con s\u1ed1. B\u1ea1n \u0111ang l\u1eafng nghe h\u1ec7 th\u1ed1ng k\u1ec3 cho b\u1ea1n c\u00e2u chuy\u1ec7n c\u1ee7a n\u00f3.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng \u0111i\u1ec3m \u0111\u00fac k\u1ebft c\u1ed1t l\u00f5i v\u1ec1 th\u1eddi gian ti\u1ebfp x\u00fac c\u00e0 ph\u00ea<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Th\u1eddi gian pha ph\u1ea3n \u00e1nh nh\u1eefng l\u1ef1a ch\u1ecdn c\u1ee7a b\u1ea1n; n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t chi\u1ebfc \u0111\u1ed3ng h\u1ed3 b\u1ea1n c\u00e0i \u0111\u1eb7t t\u00f9y \u00fd.<\/li>\n\n\n\n<li>C\u1ee1 xay ki\u1ec3m so\u00e1t th\u1eddi gian ti\u1ebfp x\u00fac m\u1ea1nh m\u1ebd nh\u1ea5t \u2014 n\u00f3 l\u00e0m thay \u0111\u1ed5i di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t v\u00e0 l\u1ef1c c\u1ea3n d\u00f2ng ch\u1ea3y c\u00f9ng m\u1ed9t l\u00fac.<\/li>\n\n\n\n<li>N\u01b0\u1edbc n\u00f3ng h\u01a1n ch\u1ea3y nhanh h\u01a1n qua l\u1edbp b\u1ed9t v\u00ec \u0111\u1ed9 nh\u1edbt gi\u1ea3m xu\u1ed1ng, l\u00e0m r\u00fat ng\u1eafn th\u1eddi gian ti\u1ebfp x\u00fac.<\/li>\n\n\n\n<li>Qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t tu\u00e2n theo th\u1ee9 t\u1ef1 c\u1ed1 \u0111\u1ecbnh: axit tr\u01b0\u1edbc, \u0111\u1ebfn \u0111\u01b0\u1eddng, r\u1ed3i \u0111\u1ebfn tannin; th\u1eddi gian quy\u1ebft \u0111\u1ecbnh nh\u00f3m n\u00e0o s\u1ebd th\u1ed1ng tr\u1ecb.<\/li>\n\n\n\n<li>H\u00e3y n\u1ebfm t\u00e1ch c\u00e0 ph\u00ea tr\u01b0\u1edbc ti\u00ean; th\u1eddi gian sau \u0111\u00f3 s\u1ebd x\u00e1c nh\u1eadn li\u1ec7u c\u1ee1 xay hay k\u1ef9 thu\u1eadt r\u00f3t c\u1ea7n ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh.<\/li>\n\n\n\n<li>Kh\u00f4ng c\u00f3 chi\u1ebfc m\u00e1y t\u00ednh n\u00e0o d\u1ef1 \u0111o\u00e1n ch\u00ednh x\u00e1c th\u1eddi gian pha c\u1ee7a b\u1ea1n \u2014 thay v\u00e0o \u0111\u00f3 h\u00e3y h\u1ecdc c\u00e1ch \u0111\u1ecdc c\u00e1c bi\u1ebfn s\u1ed1.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 th\u1eddi gian ti\u1ebfp x\u00fac: G\u00f3c nh\u00ecn chuy\u00ean gia<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q: Quy t\u1eafc 30 gi\u00e2y cho espresso c\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t hi\u1ec3u l\u1ea7m kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: \u0110\u00f3 l\u00e0 m\u1ed9t ch\u1ec9 d\u1eabn \u0111\u1ecbnh h\u01b0\u1edbng, kh\u00f4ng ph\u1ea3i m\u1ed9t quy t\u1eafc b\u1ea5t di b\u1ea5t d\u1ecbch. Th\u1eddi gian espresso sinh ra t\u1eeb c\u1ee1 xay, \u0111\u1ecbnh l\u01b0\u1ee3ng v\u00e0 \u00e1p su\u1ea5t \u2014 b\u1ea1n kh\u00f4ng c\u00e0i \u0111\u1eb7t \u0111\u1ed3ng h\u1ed3 h\u1eb9n gi\u1edd. M\u1ed9t shot 30 gi\u00e2y c\u00f3 th\u1ec3 c\u00f3 v\u1ecb ho\u00e0n h\u1ea3o ho\u1eb7c t\u1ec7 h\u1ea1i, v\u00ec v\u1eady h\u00e3y lu\u00f4n n\u1ebfm tr\u01b0\u1edbc. Khung th\u1eddi gian l\u00e0 m\u1ed9t tri\u1ec7u ch\u1ee9ng, kh\u00f4ng ph\u1ea3i \u0111\u00edch \u0111\u1ebfn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: M\u00e0ng l\u1ecdc kim lo\u1ea1i l\u00e0m thay \u0111\u1ed5i th\u1eddi gian ti\u1ebfp x\u00fac th\u1ebf n\u00e0o so v\u1edbi gi\u1ea5y l\u1ecdc?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: L\u1ef1c c\u1ea3n c\u1ee7a m\u00e0ng l\u1ecdc l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3; ch\u00ednh l\u1edbp b\u1ed9t c\u00e0 ph\u00ea m\u1edbi chi ph\u1ed1i d\u00f2ng ch\u1ea3y. M\u00e0ng kim lo\u1ea1i cho nhi\u1ec1u h\u1ea1t b\u1ed9t m\u1ecbn (fines) \u0111i qua h\u01a1n, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m n\u00e9n nh\u1eb9 l\u1edbp b\u1ed9t v\u00e0 k\u00e9o d\u00e0i th\u1eddi gian r\u00fat n\u01b0\u1edbc, nh\u01b0ng s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y r\u1ea5t nh\u1ecf so v\u1edbi vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh c\u1ee1 xay.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: Giai \u0111o\u1ea1n \u1ee7 n\u1edf (bloom) d\u00e0i h\u01a1n c\u00f3 th\u1ef1c s\u1ef1 h\u1eefu \u00edch hay ch\u1ec9 l\u00e3ng ph\u00ed th\u1eddi gian?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: Giai \u0111o\u1ea1n \u1ee7 d\u00e0i h\u01a1n gi\u1ea3i ph\u00f3ng nhi\u1ec1u CO\u2082 h\u01a1n, l\u00e0m gi\u1ea3m c\u00e1c t\u00fai kh\u00ed g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng t\u1ea1o r\u00e3nh (channeling). \u0110i\u1ec1u n\u00e0y gi\u00fap d\u00f2ng ch\u1ea3y sau \u0111\u00f3 \u0111\u1ec1u h\u01a1n v\u00e0 nhanh h\u01a1n m\u1ed9t ch\u00fat, v\u00ec v\u1eady 15 gi\u00e2y b\u1ed5 sung \u0111\u00f3 th\u01b0\u1eddng gi\u00fap n\u00e2ng cao t\u00ednh nh\u1ea5t qu\u00e1n ch\u1ee9 kh\u00f4ng \u0111\u01a1n thu\u1ea7n ch\u1ec9 l\u00e0 k\u00e9o d\u00e0i th\u1eddi gian pha.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: T\u1ea1i sao cold brew kh\u00f4ng b\u1ecb chi\u1ebft xu\u1ea5t qu\u00e1 m\u1ee9c ngay c\u1ea3 sau 24 gi\u1edd ng\u00e2m?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a n\u01b0\u1edbc l\u1ea1nh l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t m\u1ed9t c\u00e1ch tri\u1ec7t \u0111\u1ec3, v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ng\u00e2m \u1ee7 s\u1ebd ch\u1ea1m t\u1edbi tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng b\u00e3o h\u00f2a, ng\u0103n ch\u1eb7n s\u1ef1 h\u00f2a tan ti\u1ebfp di\u1ec5n. C\u00f9ng c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u00f3 v\u1eabn \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t, nh\u01b0ng v\u1edbi t\u1ed1c \u0111\u1ed9 s\u00ean b\u00f2, v\u00ec v\u1eady v\u1ecb \u0111\u1eafng g\u1eaft hi\u1ebfm khi xu\u1ea5t hi\u1ec7n ngay c\u1ea3 \u1edf th\u1eddi gian ng\u00e2m c\u1ef1c d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: \u0110\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed c\u00f3 th\u1ef1c s\u1ef1 l\u00e0m thay \u0111\u1ed5i th\u1eddi gian pha m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ed5i c\u1ee1 xay kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: C\u00f3, \u0111\u1ed9 \u1ea9m khi\u1ebfn c\u00e1c h\u1ea1t b\u1ed9t m\u1ecbn v\u00f3n c\u1ee5c l\u1ea1i v\u1edbi nhau, t\u1ea1o ra c\u00e1c khe r\u00e3nh l\u1edbn h\u01a1n, x\u1ed1p h\u01a1n trong l\u1edbp b\u1ed9t. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m l\u1ef1c c\u1ea3n d\u00f2ng ch\u1ea3y, d\u1eabn \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 r\u00fat n\u01b0\u1edbc nhanh h\u01a1n \u2014 c\u00f9ng c\u1ee1 xay, c\u00f9ng \u0111\u1ecbnh l\u01b0\u1ee3ng v\u00e0 k\u1ef9 thu\u1eadt nh\u01b0ng \u0111\u1ed9t nhi\u00ean l\u1ea1i cho ra m\u1ebb pha ng\u1eafn h\u01a1n tr\u00f4ng th\u1ea5y.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q: N\u1ebfu kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n th\u1eddi gian pha ch\u00ednh x\u00e1c, vi\u1ec7c b\u1ea5m gi\u1edd c\u00f3 \u00fd ngh\u0129a g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A: B\u1ea5m gi\u1edd gi\u00fap theo d\u00f5i s\u1ef1 tr\u00f4i d\u1ea1t c\u1ee7a h\u1ec7 th\u1ed1ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111\u1ec3 theo \u0111u\u1ed5i m\u1ed9t c\u00f4ng th\u1ee9c c\u1ee9ng nh\u1eafc. Khi m\u1ebb V60 th\u00f4ng th\u01b0\u1eddng 3 ph\u00fat \u0111\u1ed9t ng\u1ed9t k\u00e9o d\u00e0i th\u00e0nh 3:30, \u0111i\u1ec1u g\u00ec \u0111\u00f3 \u0111\u00e3 thay \u0111\u1ed5i \u2014 \u0111\u1ed9 tr\u00f4i m\u00e1y xay, tu\u1ed5i c\u1ee7a h\u1ea1t hay nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc. Con s\u1ed1 b\u1eaft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi v\u1ecb gi\u00e1c c\u1ee7a b\u1ea1n k\u1ecbp nh\u1eadn ra.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea: T\u1ed5ng quan v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh &#8211; sciencedirect.com<\/li>\n\n\n\n<li>M\u00f4 h\u00ecnh v\u1ec1 \u0111\u1ed9 th\u1ea5m c\u1ee7a b\u00e1nh c\u00e0 ph\u00ea &#8211; royalsocietypublishing.org<\/li>\n\n\n\n<li>M\u1ed1i quan h\u1ec7 gi\u1eefa c\u1ee1 xay v\u00e0 chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea &#8211; perfectdailygrind.com<\/li>\n\n\n\n<li>C\u00f4ng th\u1ee9c IAPWS 2008 v\u1ec1 \u0111\u1ed9 nh\u1edbt c\u1ee7a n\u01b0\u1edbc th\u00f4ng th\u01b0\u1eddng &#8211; iapws.org<\/li>\n\n\n\n<li>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc \u0111\u1ebfn chi\u1ebft xu\u1ea5t c\u00e0 ph\u00ea &#8211; mdpi.com<\/li>\n\n\n\n<li>T\u01b0\u01a1ng quan ch\u1ea5t l\u01b0\u1ee3ng espresso v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u00e1y pha &#8211; mdpi.com<\/li>\n\n\n\n<li>Thay \u0111\u1ed5i chi\u1ebft xu\u1ea5t Espresso c\u00f9ng Scott Rao &#8211; baristamagazine.com<\/li>\n\n\n\n<li>M\u00f4 h\u00ecnh th\u1ea5m tr\u00ean m\u00e1y t\u00ednh cho c\u00e0 ph\u00ea Espresso &#8211; mdpi.com<\/li>\n<\/ul>\n\n\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is the 30-second rule for espresso a myth?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It's a guideline, not a rule. Espresso time emerges from grind, dose, and pressure \u2014 you don't set a timer. A 30-second shot can taste perfect or awful, so always taste first. The window is a symptom, not a target.\"}},{\"@type\":\"Question\",\"name\":\"How does a metal filter change coffee contact time compared to paper?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Filter resistance is negligible; the coffee bed itself governs flow. Metal filters let more fines pass, which can slightly compact the bed and extend drawdown, but the difference is minor compared to grind size adjustments.\"}},{\"@type\":\"Question\",\"name\":\"Does a longer bloom actually help, or is it wasted time?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A longer bloom releases more CO2, reducing gas pockets that cause channeling. This can make subsequent flow more even and slightly faster, so those extra 15 seconds often improve consistency rather than just delaying the brew.\"}},{\"@type\":\"Question\",\"name\":\"Why doesn't cold brew over-extract even after 24 hours?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Cold water's low temperature drastically slows extraction, and immersion reaches saturation equilibrium, halting further dissolving. The same compounds extract, but at a snail's pace, so bitterness rarely appears even at extreme steep times.\"}},{\"@type\":\"Question\",\"name\":\"Can humidity really alter your brew time without changing grind size?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, moisture causes fines to clump together, creating larger, more porous channels in the bed. This lowers flow resistance, leading to faster drawdown \u2014 identical grind, dose, and technique can suddenly produce a noticeably shorter brew.\"}},{\"@type\":\"Question\",\"name\":\"If you can't predict exact brew time, what's the point of timing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Timing tracks system drift, not a fixed recipe. When your usual 3-minute V60 suddenly runs 3:30, something changed \u2014 grind shift, bean age, or water temp. The number catches problems before your palate does.\"}}]}<\/script>\n\n\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/coffeefactz.com\/coffee-contact-time-extraction\/#webpage\",\"about\":[{\"name\":\"Coffee Contact Time\"}],\"mentions\":[{\"name\":\"Percolation\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/01rp90\"},{\"name\":\"Espresso\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/0ctfk\"},{\"name\":\"Surface Area\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/025sfyt\"},{\"name\":\"Permeability\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/038jzy\"},{\"name\":\"Darcy's Law\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/03gyb9\"},{\"name\":\"Carbon Dioxide\",\"sameAs\":\"https:\/\/www.google.com\/search?kgmid=\/m\/01s7k\"}]}]}<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Th\u1eddi gian ti\u1ebfp x\u00fac trong pha c\u00e0 ph\u00ea l\u00e0 bi\u1ebfn s\u1ed1 ph\u1ee5 thu\u1ed9c, kh\u00f4ng ph\u1ea3i c\u00e0i \u0111\u1eb7t tr\u1ef1c ti\u1ebfp. N\u00f3 xu\u1ea5t hi\u1ec7n t\u1eeb s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 v\u00e0 d\u1ee5ng c\u1ee5 pha. Qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t tu\u1ea7n t\u1ef1 khi\u1ebfn c\u00e1c axit tr\u00e1i c\u00e2y, h\u1ee3p ch\u1ea5t Maillard v\u00e0 tannin h\u00f2a tan theo m\u1ed1c th\u1eddi gian chu\u1ea9n x\u00e1c.<\/p>\n","protected":false},"author":1,"featured_media":49534,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"","_members_access_role":[],"_members_access_error":"","rank_math_title":"Th\u1eddi gian ti\u1ebfp x\u00fac quy\u1ebft \u0111\u1ecbnh h\u01b0\u01a1ng v\u1ecb t\u00e1ch c\u00e0 ph\u00ea","rank_math_description":"Th\u1eddi gian pha kh\u00f4ng ph\u1ea3i th\u00f4ng s\u1ed1 b\u1ea1n c\u00e0i \u0111\u1eb7t t\u00f9y \u00fd - \u0111\u00f3 l\u00e0 bi\u1ebfn s\u1ed1 ph\u1ee5 thu\u1ed9c b\u1ecb chi ph\u1ed1i b\u1edfi \u0111\u1ed9 m\u1ecbn, nhi\u1ec7t \u0111\u1ed9 v\u00e0 d\u1ee5ng c\u1ee5 pha. Kh\u00e1m ph\u00e1 ngay.","rank_math_canonical_url":"","rank_math_focus_keyword":"thoi gian tiep xuc trong pha ca phe","_wpscp_schedule_draft_date":"","_wpscp_schedule_republish_date":"","_wpscppro_advance_schedule":false,"_wpscppro_advance_schedule_date":"","_wpscppro_dont_share_socialmedia":false,"_wpscppro_custom_social_share_image":0,"_facebook_share_type":"","_twitter_share_type":"","_linkedin_share_type":"","_pinterest_share_type":"","_linkedin_share_type_page":"","_instagram_share_type":"","_medium_share_type":"","_threads_share_type":"","_google_business_share_type":"","_bluesky_share_type":"","_mastodon_share_type":"","_selected_social_profile":[],"_wpsp_enable_custom_social_template":false,"_wpsp_social_scheduling":{"enabled":false,"datetime":null,"platforms":[],"status":"template_only","dateOption":"","timeOption":"","customDays":"","customHours":"","customDate":"","customTime":"","schedulingType":""},"_wpsp_active_default_template":true},"categories":[133],"tags":[],"class_list":["post-54475","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pha-che"],"uagb_featured_image_src":{"full":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction.webp",1280,720,false],"thumbnail":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction-150x150.webp",150,150,true],"medium":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction-300x169.webp",300,169,true],"medium_large":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction-768x432.webp",768,432,true],"large":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction-1024x576.webp",1024,576,true],"1536x1536":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction.webp",1280,720,false],"2048x2048":["https:\/\/coffeefactz.com\/wp-content\/uploads\/2026\/05\/coffee-contact-time-perfect-extraction.webp",1280,720,false]},"uagb_author_info":{"display_name":"Pham Toan","author_link":"https:\/\/coffeefactz.com\/vi\/author\/pham-toan\/"},"uagb_comment_info":0,"uagb_excerpt":"Th\u1eddi gian ti\u1ebfp x\u00fac trong pha c\u00e0 ph\u00ea l\u00e0 bi\u1ebfn s\u1ed1 ph\u1ee5 thu\u1ed9c, kh\u00f4ng ph\u1ea3i c\u00e0i \u0111\u1eb7t tr\u1ef1c ti\u1ebfp. N\u00f3 xu\u1ea5t hi\u1ec7n t\u1eeb s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u1ee1 xay, nhi\u1ec7t \u0111\u1ed9 v\u00e0 d\u1ee5ng c\u1ee5 pha. Qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t tu\u1ea7n t\u1ef1 khi\u1ebfn c\u00e1c axit tr\u00e1i c\u00e2y, h\u1ee3p ch\u1ea5t Maillard v\u00e0 tannin h\u00f2a tan theo m\u1ed1c&hellip;","_links":{"self":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts\/54475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/comments?post=54475"}],"version-history":[{"count":1,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts\/54475\/revisions"}],"predecessor-version":[{"id":54490,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/posts\/54475\/revisions\/54490"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/media\/49534"}],"wp:attachment":[{"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/media?parent=54475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/categories?post=54475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coffeefactz.com\/vi\/wp-json\/wp\/v2\/tags?post=54475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}