{"id":55443,"date":"2026-06-30T08:18:04","date_gmt":"2026-06-30T08:18:04","guid":{"rendered":"https:\/\/staging.pageloot.com\/uncategorized\/how-to-test-a-qr-code-before-printing\/"},"modified":"2026-07-02T17:10:51","modified_gmt":"2026-07-02T17:10:51","slug":"test-a-qr-code-before-printing","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/how-to\/test-a-qr-code-before-printing\/","title":{"rendered":"C\u00e1ch \u0111\u1ec3 Ki\u1ec3m tra m\u1ed9t M\u00e3 QR Tr\u01b0\u1edbc khi In"},"content":{"rendered":"<p class=\"wp-block-paragraph\">G\u1eedi m\u00e3 QR \u0111\u1ec3 in m\u00e0 kh\u00f4ng ki\u1ec3m tra tr\u01b0\u1edbc l\u00e0 m\u1ed9t trong nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t \u2013 v\u00e0 t\u1ed1n k\u00e9m nh\u1ea5t \u2013 trong ti\u1ebfp th\u1ecb in \u1ea5n. M\u1ed9t m\u00e3 tr\u00f4ng ho\u00e0n h\u1ea3o tr\u00ean m\u00e0n h\u00ecnh c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i ho\u00e0n to\u00e0n khi \u0111\u01b0\u1ee3c in ra gi\u1ea5y, nh\u1ef1a vinyl ho\u1eb7c bao b\u00ec. H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd ch\u1ec9 cho b\u1ea1n m\u1ecdi ki\u1ec3m tra c\u1ea7n th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi duy\u1ec7t m\u1ed9t l\u1ea7n in.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao m\u00e3 QR th\u1ea5t b\u1ea1i sau khi in<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t m\u00e3 QR qu\u00e9t s\u1ea1ch tr\u00ean m\u00e0n h\u00ecnh c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i trong th\u1ebf gi\u1edbi th\u1ef1c v\u00ec nh\u1eefng l\u00fd do ch\u1ec9 tr\u1edf n\u00ean r\u00f5 r\u00e0ng sau khi in. Hi\u1ec3u r\u00f5 nh\u1eefng \u0111i\u1ec3m th\u1ea5t b\u1ea1i n\u00e0y gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng m\u1ed9t danh s\u00e1ch ki\u1ec3m tra tr\u01b0\u1edbc khi in \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>K\u00edch th\u01b0\u1edbc qu\u00e1 nh\u1ecf<\/strong> so v\u1edbi kho\u1ea3ng c\u00e1ch qu\u00e9t d\u1ef1 ki\u1ebfn<\/li>\n<li><strong>\u0110\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p<\/strong> g\u00e2y ra c\u00e1c m\u00f4-\u0111un m\u1edd ho\u1eb7c b\u1ecb v\u1ee1 h\u1ea1t<\/li>\n<li><strong>\u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n kh\u00f4ng \u0111\u1ee7<\/strong> gi\u1eefa m\u00e3 v\u00e0 n\u1ec1n c\u1ee7a n\u00f3<\/li>\n<li><strong>Thi\u1ebfu v\u00f9ng y\u00ean t\u0129nh<\/strong> (vi\u1ec1n r\u00f5 r\u00e0ng bao quanh m\u00e3)<\/li>\n<li><strong>M\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u cao<\/strong> t\u1ea1o ra m\u1ed9t m\u1eabu qu\u00e1 nh\u1ecf \u0111\u1ec3 m\u00e1y \u1ea3nh \u0111\u1ecdc \u0111\u01b0\u1ee3c<\/li>\n<li><strong>\u0110\u1ecbnh d\u1ea1ng t\u1ec7p sai<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u0111\u1ea7u ra in<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u1ec1u c\u00f3 th\u1ec3 ph\u00f2ng ng\u1eeba ho\u00e0n to\u00e0n n\u1ebfu b\u1ea1n ph\u00e1t hi\u1ec7n ra n\u00f3 tr\u01b0\u1edbc khi m\u00e1y in ch\u1ea1y. C\u00e1c ph\u1ea7n d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u1ea3i quy\u1ebft t\u1eebng v\u1ea5n \u0111\u1ec1 theo th\u1ee9 t\u1ef1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ki\u1ec3m tra k\u00edch th\u01b0\u1edbc m\u00e3 QR c\u1ee7a b\u1ea1n so v\u1edbi kho\u1ea3ng c\u00e1ch qu\u00e9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc l\u00e0 l\u00fd do ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn m\u00e3 QR in b\u1ecb l\u1ed7i. Quy t\u1eafc ti\u00eau chu\u1ea9n l\u00e0 <strong>10:1<\/strong>: chi\u1ec1u r\u1ed9ng m\u00e3 QR ph\u1ea3i \u00edt nh\u1ea5t 1 cm (ho\u1eb7c 1 inch) cho m\u1ed7i 10 cm (ho\u1eb7c 10 inch) kho\u1ea3ng c\u00e1ch qu\u00e9t d\u1ef1 ki\u1ebfn. M\u1ed9t m\u00e3 tr\u00ean danh thi\u1ebfp \u0111\u01b0\u1ee3c gi\u1eef \u1edf kho\u1ea3ng c\u00e1ch c\u00e1nh tay c\u1ea7n k\u00edch th\u01b0\u1edbc r\u1ea5t kh\u00e1c so v\u1edbi m\u00e3 tr\u00ean \u00e1p ph\u00edch \u0111\u01b0\u1ee3c \u0111\u1ecdc t\u1eeb kh\u1eafp ph\u00f2ng.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/06\/content-asset-aaea86-9c56c1fb4cab.webp\" alt=\"h\u01b0\u1edbng d\u1eabn k\u00edch th\u01b0\u1edbc m\u00e3 QR c\u1ee7a ch\u00fang t\u00f4i\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng b\u1ea3ng n\u00e0y l\u00e0m \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u cho c\u00e1c v\u1eadt li\u1ec7u in ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<figure>\n<table>\n<thead>\n<tr>\n<th>V\u1eadt li\u1ec7u in<\/th>\n<th>K\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t<\/th>\n<th>Kho\u1ea3ng c\u00e1ch qu\u00e9t \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Danh thi\u1ebfp \/ nh\u00e3n<\/td>\n<td>2 \u00d7 2 cm (0.8 \u00d7 0.8 in)<\/td>\n<td>20\u201330 cm (8\u201312 in)<\/td>\n<\/tr>\n<tr>\n<td>T\u1edd r\u01a1i \/ t\u1edd qu\u1ea3ng c\u00e1o<\/td>\n<td>3 \u00d7 3 cm (1.2 \u00d7 1.2 in)<\/td>\n<td>30 cm (12 in)<\/td>\n<\/tr>\n<tr>\n<td>\u00c1p ph\u00edch \/ b\u1ea3ng hi\u1ec7u<\/td>\n<td>4 \u00d7 4 cm (1.6 \u00d7 1.6 in)<\/td>\n<td>40 cm (16 in)<\/td>\n<\/tr>\n<tr>\n<td>B\u1ea3ng qu\u1ea3ng c\u00e1o l\u1edbn \/ bi\u1ec3u ng\u1eef<\/td>\n<td>40 \u00d7 40 cm (16 \u00d7 16 in)<\/td>\n<td>4 m (13 ft)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi duy\u1ec7t b\u1ea5t k\u1ef3 t\u1ec7p in n\u00e0o, h\u00e3y x\u00e1c nh\u1eadn k\u00edch th\u01b0\u1edbc m\u00e3 ph\u00f9 h\u1ee3p v\u1edbi tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng d\u1ef1 ki\u1ebfn c\u1ee7a b\u1ea1n. <a href=\"https:\/\/pageloot.com\/vi\/how-to\/qr-code-size-guide\/\">h\u01b0\u1edbng d\u1eabn k\u00edch th\u01b0\u1edbc m\u00e3 QR c\u1ee7a ch\u00fang t\u00f4i<\/a> cung c\u1ea5p ph\u00e2n t\u00edch \u0111\u1ea7y \u0111\u1ee7 theo lo\u1ea1i v\u1eadt li\u1ec7u, bao g\u1ed3m c\u00e1ch m\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u kh\u1ea3 thi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">X\u00e1c minh \u0111\u1ecbnh d\u1ea1ng t\u1ec7p v\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i in c\u1ee7a b\u1ea1n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh d\u1ea1ng b\u1ea1n xu\u1ea5t ra quan tr\u1ecdng kh\u00f4ng k\u00e9m g\u00ec ch\u00ednh thi\u1ebft k\u1ebf. H\u00ecnh \u1ea3nh raster nh\u01b0 PNG v\u00e0 JPEG \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb c\u00e1c pixel. Khi ph\u00f3ng to \u0111\u1ec3 in kh\u1ed5 l\u1edbn, ch\u00fang s\u1ebd b\u1ecb m\u1edd v\u00e0 c\u00e1c m\u00f4-\u0111un nh\u1ecf trong m\u00e3 QR s\u1ebd m\u1ea5t \u0111i c\u00e1c c\u1ea1nh s\u1eafc n\u00e9t \u2013 khi\u1ebfn m\u00e3 kh\u00f3 ho\u1eb7c kh\u00f4ng th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 m\u00e3 QR in n\u00e0o, h\u00e3y s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ecbnh d\u1ea1ng vector: SVG, EPS ho\u1eb7c PDF.<\/strong> T\u1ec7p vector c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng \u0111\u1ebfn b\u1ea5t k\u1ef3 k\u00edch th\u01b0\u1edbc n\u00e0o m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng v\u00ec ch\u00fang \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1eb1ng to\u00e1n h\u1ecdc ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u1eebng pixel. N\u1ebfu b\u1ea1n b\u1eaft bu\u1ed9c ph\u1ea3i s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng raster, h\u00e3y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ph\u00e2n gi\u1ea3i l\u00e0 <strong>\u00edt nh\u1ea5t 300 DPI<\/strong> \u1edf k\u00edch th\u01b0\u1edbc in d\u1ef1 ki\u1ebfn \u2013 kh\u00f4ng ph\u1ea3i \u1edf k\u00edch th\u01b0\u1edbc xem tr\u01b0\u1edbc tr\u00ean m\u00e0n h\u00ecnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra \u0111\u1ed9 ph\u00e2n gi\u1ea3i nhanh: m\u1edf t\u1ec7p h\u00ecnh \u1ea3nh c\u1ee7a b\u1ea1n, ghi l\u1ea1i k\u00edch th\u01b0\u1edbc pixel c\u1ee7a n\u00f3 v\u00e0 chia cho k\u00edch th\u01b0\u1edbc in d\u1ef1 ki\u1ebfn theo inch. N\u1ebfu m\u00e3 QR 1 inch \u0111\u01b0\u1ee3c l\u01b0u d\u01b0\u1edbi d\u1ea1ng h\u00ecnh \u1ea3nh 100 \u00d7 100 pixel, th\u00ec n\u00f3 ch\u1ec9 c\u00f3 100 DPI \u2013 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ee9c t\u1ed1i thi\u1ec3u 300 DPI v\u00e0 g\u1ea7n nh\u01b0 ch\u1eafc ch\u1eafn s\u1ebd in ra b\u1ecb m\u1edd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y, <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-print-resolution-guide\/\">h\u01b0\u1edbng d\u1eabn \u0111\u1ed9 ph\u00e2n gi\u1ea3i in m\u00e3 QR<\/a> bao g\u1ed3m c\u00e1c y\u00eau c\u1ea7u v\u1ec1 DPI v\u00e0 l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng m\u1ed9t c\u00e1ch chi ti\u1ebft.<\/p>\n\n\n\n<blockquote class=\"is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>T\u1ea1o m\u00e3 QR s\u1eb5n s\u00e0ng in trong v\u00e0i gi\u00e2y<\/strong> C\u00e1c <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator\/\">Tr\u00ecnh t\u1ea1o m\u00e3 QR Pageloot<\/a> cho ph\u00e9p b\u1ea1n t\u1ea3i xu\u1ed1ng m\u00e3 c\u1ee7a m\u00ecnh \u1edf \u0111\u1ecbnh d\u1ea1ng SVG, EPS v\u00e0 PDF \u2013 s\u1eb5n s\u00e0ng cho m\u1ecdi k\u00edch th\u01b0\u1edbc in m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Ki\u1ec3m tra \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n tr\u01b0\u1edbc khi in<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e1y qu\u00e9t m\u00e3 QR ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e2n bi\u1ec7t c\u00e1c m\u00f4-\u0111un t\u1ed1i v\u1edbi n\u1ec1n s\u00e1ng. Khi \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n qu\u00e1 th\u1ea5p, m\u00e1y qu\u00e9t kh\u00f4ng th\u1ec3 nh\u1eadn d\u1ea1ng \u0111\u00e1ng tin c\u1eady m\u1eabu \u2013 ngay c\u1ea3 khi m\u00e3 tr\u00f4ng v\u1eabn \u1ed5n \u0111\u1ed1i v\u1edbi m\u1eaft ng\u01b0\u1eddi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt c\u1ea7n \u0111\u1ea1t l\u00e0 <strong>t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n t\u1ed1i thi\u1ec3u l\u00e0 4:1<\/strong> gi\u1eefa c\u00e1c m\u00f4-\u0111un t\u1ed1i v\u00e0 n\u1ec1n s\u00e1ng. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng thanh to\u00e1n ho\u1eb7c c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1eadp trung v\u00e0o kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn, h\u00e3y \u0111\u1eb7t m\u1ee5c ti\u00eau <strong>5:1 tr\u1edf l\u00ean<\/strong>. C\u00e1c m\u00f4-\u0111un m\u00e0u \u0111en tr\u00ean n\u1ec1n tr\u1eafng t\u1ea1o ra t\u1ef7 l\u1ec7 21:1 \u2013 ti\u00eau chu\u1ea9n v\u00e0ng m\u00e0 m\u1ecdi s\u1ef1 k\u1ebft h\u1ee3p m\u00e0u s\u1eafc kh\u00e1c \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ed7i t\u01b0\u01a1ng ph\u1ea3n ph\u1ed5 bi\u1ebfn c\u1ea7n ki\u1ec3m tra tr\u01b0\u1edbc khi in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>C\u00e1c m\u00f4-\u0111un m\u00e0u x\u00e1m nh\u1ea1t tr\u00ean n\u1ec1n tr\u1eafng<\/strong>: \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n kh\u00f4ng \u0111\u1ee7 s\u1ebd th\u1ea5t b\u1ea1i trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu<\/li>\n<li><strong>M\u00e0u s\u1eafc \u0111\u1ea3o ng\u01b0\u1ee3c (m\u00e3 s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i)<\/strong>: m\u1ed9t s\u1ed1 m\u00e1y qu\u00e9t x\u1eed l\u00fd \u0111\u01b0\u1ee3c, nhi\u1ec1u m\u00e1y th\u00ec kh\u00f4ng \u2013 \u0111\u1eebng bao gi\u1edd d\u1ef1a v\u00e0o \u0111i\u1ec1u n\u00e0y<\/li>\n<li><strong>\u0110\u1ed5 m\u00e0u gradient tr\u00ean c\u00e1c m\u00f4-\u0111un<\/strong>: t\u1ea1o ra \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u g\u00e2y nh\u1ea7m l\u1eabn cho m\u00e1y qu\u00e9t<\/li>\n<li><strong>M\u00e0u s\u1eafc th\u01b0\u01a1ng hi\u1ec7u c\u00f3 t\u00f4ng m\u00e0u qu\u00e1 g\u1ea7n nhau<\/strong>: ki\u1ec3m tra v\u1edbi chuy\u1ec3n \u0111\u1ed5i thang \u0111\u1ed9 x\u00e1m \u0111\u1ec3 xem \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ef1c<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t th\u1eed nghi\u1ec7m th\u1ef1c t\u1ebf tr\u01b0\u1edbc khi in l\u00e0 chuy\u1ec3n \u0111\u1ed5i h\u00ecnh \u1ea3nh m\u00e3 QR c\u1ee7a b\u1ea1n sang thang \u0111\u1ed9 x\u00e1m v\u00e0 ki\u1ec3m tra xem c\u00e1c m\u00f4-\u0111un c\u00f3 c\u00f2n ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng v\u1edbi n\u1ec1n hay kh\u00f4ng. N\u1ebfu ch\u00fang b\u1eaft \u0111\u1ea7u h\u00f2a l\u1eabn v\u00e0o nhau trong thang \u0111\u1ed9 x\u00e1m, ch\u00fang s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t tr\u00ean nhi\u1ec1u lo\u1ea1i camera thi\u1ebft b\u1ecb v\u00e0 \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng kh\u00e1c nhau. <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-color-contrast-best-practices\/\">h\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc c\u1ee7a m\u00e3 QR<\/a> bao g\u1ed3m b\u1ea3ng k\u1ebft h\u1ee3p m\u00e0u s\u1eafc hi\u1ec3n th\u1ecb t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n v\u00e0 k\u1ebft qu\u1ea3 qu\u00e9t d\u1ef1 ki\u1ebfn cho c\u00e1c c\u1eb7p ph\u1ed5 bi\u1ebfn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">X\u00e1c nh\u1eadn V\u00f9ng Y\u00ean T\u0129nh C\u00f2n Nguy\u00ean V\u1eb9n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c <strong>v\u00f9ng y\u00ean t\u0129nh<\/strong> l\u00e0 v\u00f9ng bi\u00ean tr\u1ed1ng bao quanh c\u1ea3 b\u1ed1n c\u1ea1nh c\u1ee7a m\u00e3 QR. \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t t\u00f9y ch\u1ecdn thi\u1ebft k\u1ebf \u2013 n\u00f3 l\u00e0 m\u1ed9t y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi ti\u00eau chu\u1ea9n ISO\/IEC 18004. N\u1ebfu kh\u00f4ng c\u00f3 n\u00f3, m\u00e1y qu\u00e9t kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed m\u00e3 b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac, v\u00e0 qu\u00e1 tr\u00ecnh qu\u00e9t s\u1ebd th\u1ea5t b\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00f9ng y\u00ean t\u0129nh ph\u1ea3i l\u00e0 <strong>r\u1ed9ng \u00edt nh\u1ea5t b\u1ed1n m\u00f4-\u0111un \u1edf t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh<\/strong>, trong \u0111\u00f3 m\u1ed9t m\u00f4-\u0111un l\u00e0 m\u1ed9t trong c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf trong l\u01b0\u1edbi m\u00e3. \u0110\u1ec3 tham kh\u1ea3o th\u1ef1c t\u1ebf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed1i v\u1edbi m\u1ed9t <strong>m\u00e3 QR 1 inch<\/strong>, cho ph\u00e9p kho\u1ea3ng <strong>0,15 inch<\/strong> kh\u00f4ng gian tr\u1ed1ng \u1edf t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh<\/li>\n<li>\u0110\u1ed1i v\u1edbi m\u1ed9t <strong>m\u00e3 QR danh thi\u1ebfp<\/strong>, duy tr\u00ec m\u1ed9t <strong>v\u00f9ng y\u00ean t\u0129nh \u00edt nh\u1ea5t 0,25 inch<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi g\u1eedi in, h\u00e3y ph\u00f3ng to t\u1ec7p b\u1ed1 c\u1ee5c c\u1ee7a b\u1ea1n v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng kh\u00f4ng c\u00f3 v\u0103n b\u1ea3n, h\u00ecnh \u1ea3nh, \u0111\u01b0\u1eddng vi\u1ec1n ho\u1eb7c m\u1eabu n\u1ec1n n\u00e0o l\u1ea5n v\u00e0o v\u00f9ng n\u00e0y. \u0110\u1eb7t m\u00e3 qu\u00e1 g\u1ea7n m\u00e9p thi\u1ebft k\u1ebf ho\u1eb7c ch\u1ed3ng ch\u00e9o n\u00f3 v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 trang tr\u00ed l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra l\u1ed7i qu\u00e9t m\u00e0 ch\u1ec9 xu\u1ea5t hi\u1ec7n sau khi c\u00f4ng vi\u1ec7c \u0111\u01b0\u1ee3c in.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ki\u1ec3m tra m\u1ee9c \u0111\u1ed9 s\u1eeda l\u1ed7i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 QR c\u00f3 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ee5c h\u1ed3i t\u00edch h\u1ee3p \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>s\u1eeda l\u1ed7i<\/strong>, cho ph\u00e9p m\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ecdc ngay c\u1ea3 khi m\u1ed9t ph\u1ea7n c\u1ee7a n\u00f3 b\u1ecb h\u1ecfng, che khu\u1ea5t ho\u1eb7c m\u00f2n. C\u00f3 b\u1ed1n c\u1ea5p \u0111\u1ed9, m\u1ed7i c\u1ea5p \u0111\u1ed9 cung c\u1ea5p m\u1ed9t s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i kh\u00e1c nhau gi\u1eefa kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i v\u00e0 m\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u:<\/p>\n\n\n\n<figure>\n<table>\n<thead>\n<tr>\n<th>C\u1ea5p \u0111\u1ed9<\/th>\n<th>Kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i<\/th>\n<th>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>L (Th\u1ea5p)<\/td>\n<td>~7%<\/td>\n<td>B\u1ec1 m\u1eb7t s\u1ea1ch, kh\u00f4ng h\u01b0 h\u1ea1i; m\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u t\u1ed1i \u0111a<\/td>\n<\/tr>\n<tr>\n<td>M (Trung b\u00ecnh)<\/td>\n<td>~15%<\/td>\n<td>V\u1eadt li\u1ec7u in ti\u00eau chu\u1ea9n c\u00f3 m\u1ed9t s\u1ed1 hao m\u00f2n<\/td>\n<\/tr>\n<tr>\n<td>Q (T\u1ee9 ph\u00e2n v\u1ecb)<\/td>\n<td>~25%<\/td>\n<td>M\u00e3 c\u00f3 l\u1edbp ph\u1ee7 logo ho\u1eb7c r\u1ee7i ro h\u01b0 h\u1ecfng v\u1eeba ph\u1ea3i<\/td>\n<\/tr>\n<tr>\n<td>H (Cao)<\/td>\n<td>~30%<\/td>\n<td>S\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi, bao b\u00ec, m\u00e3 c\u00f3 l\u1edbp ph\u1ee7 logo l\u1edbn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu m\u00e3 QR c\u1ee7a b\u1ea1n bao g\u1ed3m m\u1ed9t logo \u0111\u01b0\u1ee3c ph\u1ee7 l\u00ean m\u1eabu \u2013 m\u1ed9t l\u1ef1a ch\u1ecdn th\u01b0\u01a1ng hi\u1ec7u ph\u1ed5 bi\u1ebfn \u2013 b\u1ea1n c\u1ea7n \u00edt nh\u1ea5t <strong>c\u1ea5p \u0111\u1ed9 Q<\/strong>, v\u00e0 l\u00fd t\u01b0\u1edfng nh\u1ea5t l\u00e0 c\u1ea5p \u0111\u1ed9 H. Logo che khu\u1ea5t m\u1ed9t ph\u1ea7n m\u00e3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, v\u00ec v\u1eady vi\u1ec7c s\u1eeda l\u1ed7i ph\u1ea3i b\u00f9 \u0111\u1eafp. X\u00e1c nh\u1eadn m\u00e3 c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c t\u1ea1o \u1edf c\u1ea5p \u0111\u1ed9 n\u00e0o tr\u01b0\u1edbc khi ho\u00e0n thi\u1ec7n, v\u00e0 lu\u00f4n ki\u1ec3m tra m\u00e3 c\u00f3 th\u01b0\u01a1ng hi\u1ec7u v\u1edbi l\u1edbp ph\u1ee7 \u0111\u00e3 \u0111\u1eb7t. T\u00e0i li\u1ec7u <a href=\"https:\/\/pageloot.com\/vi\/blog\/best-practices-for-qr-code-readability\/\">th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 kh\u1ea3 n\u0103ng \u0111\u1ecdc m\u00e3 QR<\/a> \u0111\u1ec1 c\u1eadp chi ti\u1ebft c\u00e1ch s\u1eeda l\u1ed7i t\u01b0\u01a1ng t\u00e1c v\u1edbi v\u1ecb tr\u00ed logo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ch\u1ea1y th\u1eed nghi\u1ec7m in v\u1eadt l\u00fd tr\u01b0\u1edbc khi in h\u00e0ng lo\u1ea1t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 ki\u1ec3m tra tr\u00ean m\u00e0n h\u00ecnh n\u00e0o c\u00f3 th\u1ec3 thay th\u1ebf vi\u1ec7c in m\u1ed9t b\u1ea3n th\u1eed v\u1eadt l\u00fd. In m\u1ed9t b\u1ea3n duy nh\u1ea5t \u1edf <strong>k\u00edch th\u01b0\u1edbc cu\u1ed1i c\u00f9ng ch\u00ednh x\u00e1c tr\u00ean v\u1eadt li\u1ec7u ch\u00ednh x\u00e1c<\/strong> b\u1ea1n \u0111\u1ecbnh s\u1eed d\u1ee5ng, sau \u0111\u00f3 ki\u1ec3m tra n\u00f3 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n ph\u1ea3n \u00e1nh vi\u1ec7c s\u1eed d\u1ee5ng trong th\u1ebf gi\u1edbi th\u1ef1c.<\/p>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/06\/content-asset-3edfd5-8d73a7d0f85d.webp\" alt=\"Qu\u00e9t b\u1ea3n in th\u1eed QR\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1eed nghi\u1ec7m v\u1eadt l\u00fd c\u1ee7a b\u1ea1n n\u00ean bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nhi\u1ec1u thi\u1ebft b\u1ecb<\/strong>: ki\u1ec3m tra tr\u00ean \u00edt nh\u1ea5t hai \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh kh\u00e1c nhau \u2013 m\u1ed9t iOS v\u00e0 m\u1ed9t Android \u2013 s\u1eed d\u1ee5ng c\u1ea3 \u1ee9ng d\u1ee5ng camera g\u1ed1c v\u00e0 m\u00e1y qu\u00e9t c\u1ee7a b\u00ean th\u1ee9 ba<\/li>\n<li><strong>Nhi\u1ec1u kho\u1ea3ng c\u00e1ch<\/strong>: qu\u00e9t t\u1eeb kho\u1ea3ng c\u00e1ch ng\u01b0\u1eddi d\u00f9ng th\u00f4ng th\u01b0\u1eddng, v\u00e0 c\u0169ng t\u1eeb xa h\u01a1n m\u1ed9t ch\u00fat \u0111\u1ec3 x\u00e1c nh\u1eadn c\u00f3 bi\u00ean \u0111\u1ed9 l\u1ed7i<\/li>\n<li><strong>Nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng<\/strong>: ki\u1ec3m tra trong \u00e1nh s\u00e1ng t\u1ef1 nhi\u00ean m\u1ea1nh, \u00e1nh s\u00e1ng trong nh\u00e0 ti\u00eau chu\u1ea9n, v\u00e0 \u00e1nh s\u00e1ng y\u1ebfu n\u1ebfu m\u00e3 s\u1ebd xu\u1ea5t hi\u1ec7n trong b\u1ea5t k\u1ef3 m\u00f4i tr\u01b0\u1eddng n\u00e0o trong s\u1ed1 \u0111\u00f3<\/li>\n<li><strong>B\u1ec1 m\u1eb7t th\u1ef1c t\u1ebf<\/strong>: b\u1ec1 m\u1eb7t b\u00f3ng ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng v\u00e0 c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i qu\u00e9t ngay c\u1ea3 khi thi\u1ebft k\u1ebf m\u00e3 ch\u00ednh x\u00e1c; l\u1edbp ho\u00e0n thi\u1ec7n m\u1edd ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady h\u01a1n trong m\u1ecdi \u0111i\u1ec1u ki\u1ec7n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 x\u00e1c minh m\u00e3 k\u1ef9 thu\u1eadt s\u1ed1 b\u1eb1ng c\u00e1ch t\u1ea3i l\u00ean h\u00ecnh \u1ea3nh thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n l\u00ean <a href=\"https:\/\/pageloot.com\/vi\/qr-code-scanner\/\">M\u00e1y qu\u00e9t m\u00e3 QR Pageloot<\/a> \u0111\u1ec3 x\u00e1c nh\u1eadn n\u00f3 gi\u1ea3i m\u00e3 ch\u00ednh x\u00e1c tr\u01b0\u1edbc khi cam k\u1ebft in h\u00e0ng lo\u1ea1t. N\u1ebfu m\u00e3 c\u1ee7a b\u1ea1n th\u1ea5t b\u1ea1i trong b\u1ea5t k\u1ef3 th\u1eed nghi\u1ec7m n\u00e0o trong s\u1ed1 n\u00e0y, h\u00e3y s\u1eed d\u1ee5ng <a href=\"https:\/\/pageloot.com\/vi\/qr-code-marketing\/why-qr-code-not-working\/\">h\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u00e3 QR ph\u1ed5 bi\u1ebfn<\/a> \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n \u0111i\u1ec3m l\u1ed7i c\u1ee5 th\u1ec3 tr\u01b0\u1edbc khi \u0111i\u1ec1u ch\u1ec9nh v\u00e0 ki\u1ec3m tra l\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 c\u00f3 c\u00e1i nh\u00ecn t\u1ed5ng quan c\u00f3 c\u1ea5u tr\u00fac v\u1ec1 nh\u1eefng g\u00ec th\u1eed nghi\u1ec7m di \u0111\u1ed9ng n\u00ean bao g\u1ed3m, t\u00e0i li\u1ec7u <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-test-qr-codes-for-mobile-usability\/\">h\u01b0\u1edbng d\u1eabn ki\u1ec3m tra m\u00e3 QR v\u1ec1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng<\/a> tr\u00ecnh b\u00e0y chi ti\u1ebft v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch thi\u1ebft b\u1ecb, g\u00f3c qu\u00e9t v\u00e0 hi\u1ec7u su\u1ea5t \u0111\u00edch.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00ednh \u0111\u1ebfn ph\u01b0\u01a1ng ph\u00e1p in v\u00e0 b\u1ec1 m\u1eb7t c\u1ee7a b\u1ea1n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch m\u00e3 QR \u0111\u01b0\u1ee3c in \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng qu\u00e9t \u0111\u1ed9c l\u1eadp v\u1edbi thi\u1ebft k\u1ebf m\u00e3. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau t\u1ea1o ra c\u00e1c m\u1ee9c \u0111\u1ed9 s\u1eafc n\u00e9t m\u00f4-\u0111un kh\u00e1c nhau, v\u00e0 c\u00e1c b\u1ec1 m\u1eb7t kh\u00e1c nhau t\u01b0\u01a1ng t\u00e1c v\u1edbi \u00e1nh s\u00e1ng theo nh\u1eefng c\u00e1ch c\u00f3 th\u1ec3 gi\u00fap ho\u1eb7c c\u1ea3n tr\u1edf vi\u1ec7c qu\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00e2n nh\u1eafc ch\u00ednh theo ph\u01b0\u01a1ng ph\u00e1p v\u00e0 v\u1eadt li\u1ec7u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>L\u1edbp ho\u00e0n thi\u1ec7n m\u1edd<\/strong> khu\u1ebfch t\u00e1n \u00e1nh s\u00e1ng thay v\u00ec ph\u1ea3n chi\u1ebfu n\u00f3, khi\u1ebfn ch\u00fang g\u1ea7n nh\u01b0 lu\u00f4n v\u01b0\u1ee3t tr\u1ed9i h\u01a1n l\u1edbp ho\u00e0n thi\u1ec7n b\u00f3ng v\u1ec1 \u0111\u1ed9 tin c\u1eady khi qu\u00e9t<\/li>\n<li><strong>In offset<\/strong> t\u1ea1o ra c\u00e1c c\u1ea1nh m\u00f4-\u0111un r\u1ea5t s\u1eafc n\u00e9t v\u00e0 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c l\u1ea7n in s\u1ed1 l\u01b0\u1ee3ng l\u1edbn<\/li>\n<li><strong>In k\u1ef9 thu\u1eadt s\u1ed1<\/strong> ho\u1ea1t \u0111\u1ed9ng t\u1ed1t cho c\u00e1c l\u1ea7n in ng\u1eafn v\u00e0 m\u00e3 t\u00f9y ch\u1ec9nh, nh\u01b0ng ch\u1ea5t l\u01b0\u1ee3ng m\u1ef1c thay \u0111\u1ed5i v\u00e0 c\u00f3 th\u1ec3 phai m\u00e0u theo th\u1eddi gian<\/li>\n<li><strong>In nhi\u1ec7t<\/strong> ti\u1ebft ki\u1ec7m cho nh\u00e3n nh\u01b0ng c\u00f3 th\u1ec3 l\u00e0m m\u1edd c\u00e1c c\u1ea1nh m\u00f4-\u0111un m\u1ecbn \u2013 t\u0103ng k\u00edch th\u01b0\u1edbc m\u00e3 \u0111\u1ec3 b\u00f9 \u0111\u1eafp<\/li>\n<li><strong>B\u1ec1 m\u1eb7t c\u00f3 k\u1ebft c\u1ea5u ho\u1eb7c cong<\/strong> g\u00e2y ra bi\u1ebfn d\u1ea1ng c\u00f3 th\u1ec3 l\u00e0m nhi\u1ec5u m\u00e1y qu\u00e9t; s\u1eed d\u1ee5ng m\u00e3 l\u1edbn h\u01a1n \u0111\u1ec3 t\u00ednh \u0111\u1ebfn \u0111i\u1ec1u \u0111\u00f3<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 c\u00f3 ph\u00e2n t\u00edch \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1ch m\u1ed7i k\u1ef9 thu\u1eadt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng qu\u00e9t, h\u01b0\u1edbng d\u1eabn v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-printing-techniques-impact-qr-code-scannability\/\">c\u00e1ch c\u00e1c k\u1ef9 thu\u1eadt in \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng qu\u00e9t m\u00e3 QR<\/a> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p, chu\u1ea9n b\u1ecb v\u1eadt li\u1ec7u n\u1ec1n v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u1ef1c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">S\u1eed d\u1ee5ng m\u00e3 QR \u0111\u1ed9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c thay \u0111\u1ed5i sau khi in<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 m\u1ed9t m\u00e3 QR \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra ho\u00e0n h\u1ea3o c\u0169ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i sau khi in n\u1ebfu URL \u0111\u00edch thay \u0111\u1ed5i, trang \u0111\u01b0\u1ee3c li\u00ean k\u1ebft b\u1ecb g\u1ee1 xu\u1ed1ng ho\u1eb7c n\u1ed9i dung chi\u1ebfn d\u1ecbch c\u1ea7n c\u1eadp nh\u1eadt. V\u1edbi m\u00e3 QR t\u0129nh, b\u1ea5t k\u1ef3 thay \u0111\u1ed5i n\u00e0o \u0111\u1ed1i v\u1edbi \u0111\u00edch \u0111\u1ec1u c\u00f3 ngh\u0129a l\u00e0 ph\u1ea3i in l\u1ea1i m\u1ecdi th\u1ee9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u00e3 QR \u0111\u1ed9ng<\/strong> gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a m\u1ed9t URL chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn thay v\u00ec \u0111\u00edch \u0111\u1ebfn cu\u1ed1i c\u00f9ng tr\u1ef1c ti\u1ebfp. Vi\u1ec7c chuy\u1ec3n h\u01b0\u1edbng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt b\u1ea5t c\u1ee9 l\u00fac n\u00e0o t\u1eeb b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a b\u1ea1n, \u0111\u1ec3 m\u00e3 \u0111\u00e3 in v\u1eabn h\u1ee3p l\u1ec7 ngay c\u1ea3 khi chi\u1ebfn d\u1ecbch c\u1ee7a b\u1ea1n ph\u00e1t tri\u1ec3n. \u0110i\u1ec1u n\u00e0y c\u0169ng c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eeda m\u1ed9t li\u00ean k\u1ebft b\u1ecb h\u1ecfng ngay l\u1eadp t\u1ee9c sau khi ph\u00e2n ph\u1ed1i \u2013 m\u00e0 kh\u00f4ng c\u1ea7n in l\u1ea1i m\u1ed9t b\u1ea3n n\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i vi\u1ec7c ng\u0103n ng\u1eeba l\u1ed7i, m\u00e3 \u0111\u1ed9ng cung c\u1ea5p cho b\u1ea1n quy\u1ec1n truy c\u1eadp v\u00e0o ph\u00e2n t\u00edch qu\u00e9t: t\u1ed5ng s\u1ed1 l\u01b0\u1ee3t qu\u00e9t, v\u1ecb tr\u00ed qu\u00e9t, th\u1eddi gian qu\u00e9t v\u00e0 lo\u1ea1i thi\u1ebft b\u1ecb. D\u1eef li\u1ec7u n\u00e0y cho b\u1ea1n bi\u1ebft li\u1ec7u t\u00e0i li\u1ec7u in c\u1ee7a b\u1ea1n c\u00f3 th\u1ef1c s\u1ef1 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 tr\u00ean th\u1ef1c t\u1ebf hay kh\u00f4ng, v\u00e0 n\u01a1i c\u1ea7n t\u1eadp trung t\u1ed1i \u01b0u h\u00f3a. C\u00e1i <a href=\"https:\/\/pageloot.com\/vi\/how-to\/use-qr-codes-in-print-media\/\">h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng m\u00e3 QR trong ph\u01b0\u01a1ng ti\u1ec7n in \u1ea5n<\/a> bao g\u1ed3m c\u00e1ch m\u00e3 \u0111\u1ed9ng ph\u00f9 h\u1ee3p v\u1edbi chi\u1ebfn l\u01b0\u1ee3c chi\u1ebfn d\u1ecbch in r\u1ed9ng h\u01a1n.<\/p>\n\n\n\n<blockquote class=\"is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>B\u1ea3o v\u1ec7 Kho\u1ea3n \u0111\u1ea7u t\u01b0 In c\u1ee7a B\u1ea1n<\/strong> T\u1ea1o m\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/dynamic-qr-code-generator\/\">M\u00e3 QR \u0111\u1ed9ng<\/a> \u0111\u1ec3 gi\u1eef cho t\u00e0i li\u1ec7u in c\u1ee7a b\u1ea1n lu\u00f4n c\u1eadp nh\u1eadt v\u00e0 theo d\u00f5i hi\u1ec7u su\u1ea5t qu\u00e9t th\u1ef1c t\u1ebf \u2013 m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i in l\u1ea1i.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Danh s\u00e1ch ki\u1ec3m tra th\u1eed nghi\u1ec7m m\u00e3 QR tr\u01b0\u1edbc khi in<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi ph\u00ea duy\u1ec7t b\u1ea5t k\u1ef3 m\u00e3 QR n\u00e0o \u0111\u1ec3 s\u1ea3n xu\u1ea5t in, h\u00e3y th\u1ef1c hi\u1ec7n t\u1eebng b\u01b0\u1edbc sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u00edch th\u01b0\u1edbc m\u00e3 ph\u00f9 h\u1ee3p v\u1edbi quy t\u1eafc 10:1 cho kho\u1ea3ng c\u00e1ch qu\u00e9t d\u1ef1 ki\u1ebfn<\/li>\n<li>T\u1ec7p \u0111\u01b0\u1ee3c xu\u1ea5t \u1edf \u0111\u1ecbnh d\u1ea1ng SVG, EPS ho\u1eb7c PDF (ho\u1eb7c raster \u1edf \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u1ed1i thi\u1ec3u 300 DPI \u1edf k\u00edch th\u01b0\u1edbc in cu\u1ed1i c\u00f9ng)<\/li>\n<li>T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n gi\u1eefa c\u00e1c m\u00f4-\u0111un v\u00e0 n\u1ec1n \u0111\u1ea1t \u00edt nh\u1ea5t 4:1<\/li>\n<li>V\u00f9ng y\u00ean t\u0129nh \u00edt nh\u1ea5t b\u1ed1n m\u00f4-\u0111un r\u00f5 r\u00e0ng \u1edf t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh<\/li>\n<li>M\u1ee9c \u0111\u1ed9 s\u1eeda l\u1ed7i ph\u00f9 h\u1ee3p (Q ho\u1eb7c H n\u1ebfu c\u00f3 l\u1edbp ph\u1ee7 logo)<\/li>\n<li>M\u00e3 gi\u1ea3i m\u00e3 ch\u00ednh x\u00e1c khi \u0111\u01b0\u1ee3c qu\u00e9t t\u1eeb m\u1ed9t h\u00ecnh \u1ea3nh \u0111\u00e3 t\u1ea3i l\u00ean<\/li>\n<li>B\u1ea3n in th\u1eed v\u1eadt l\u00fd \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra tr\u00ean c\u1ea3 thi\u1ebft b\u1ecb iOS v\u00e0 Android<\/li>\n<li>B\u1ea3n in th\u1eed v\u1eadt l\u00fd \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng th\u1ef1c t\u1ebf v\u00e0 tr\u00ean v\u1eadt li\u1ec7u in th\u1ef1c t\u1ebf<\/li>\n<li>URL \u0111\u00edch \u0111ang ho\u1ea1t \u0111\u1ed9ng, \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho thi\u1ebft b\u1ecb di \u0111\u1ed9ng v\u00e0 t\u1ea3i nhanh<\/li>\n<li>M\u00e3 QR \u0111\u1ed9ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng n\u1ebfu \u0111\u00edch \u0111\u1ebfn c\u00f3 th\u1ec3 c\u1ea7n thay \u0111\u1ed5i sau khi in<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c hi\u1ec7n c\u00e1c ki\u1ec3m tra n\u00e0y tr\u01b0\u1edbc m\u1ed7i l\u1ea7n in t\u1ed1n \u00edt th\u1eddi gian h\u01a1n nhi\u1ec1u so v\u1edbi vi\u1ec7c \u0111\u1eb7t in l\u1ea1i. Hi\u1ec7u su\u1ea5t m\u00e3 QR t\u1ed1t b\u1eaft \u0111\u1ea7u t\u1eeb t\u1ec7p, kh\u00f4ng ph\u1ea3i t\u1eeb m\u00e1y qu\u00e9t. \u0110\u1ea3m b\u1ea3o k\u00edch th\u01b0\u1edbc, \u0111\u1ecbnh d\u1ea1ng, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n v\u00e0 v\u00f9ng y\u00ean t\u0129nh ch\u00ednh x\u00e1c ngay t\u1eeb giai \u0111o\u1ea1n thi\u1ebft k\u1ebf, in m\u1ed9t b\u1ea3n th\u1eed tr\u00ean v\u1eadt li\u1ec7u th\u1ef1c t\u1ebf v\u00e0 ki\u1ec3m tra n\u00f3 theo c\u00e1ch m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a b\u1ea1n s\u1ebd th\u1ef1c s\u1ef1 s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<div class=\"schema-faq\"><div class=\"schema-faq-section\" id=\"faq-question-e0da87b2fc17\"><strong class=\"schema-faq-question\">K\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u m\u1ed9t m\u00e3 QR n\u00ean l\u00e0 bao nhi\u00eau \u0111\u1ec3 in?<\/strong> <p class=\"schema-faq-answer\">M\u1ee9c t\u1ed1i thi\u1ec3u \u0111\u00e1ng tin c\u1eady cho vi\u1ec7c qu\u00e9t \u1edf c\u1ef1 ly g\u1ea7n \u2013 ch\u1eb3ng h\u1ea1n nh\u01b0 tr\u00ean danh thi\u1ebfp ho\u1eb7c nh\u00e3n s\u1ea3n ph\u1ea9m \u2013 l\u00e0 2 \u00d7 2 cm (0,8 \u00d7 0,8 inch). \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e0i li\u1ec7u in l\u1edbn h\u01a1n, \u00e1p d\u1ee5ng quy t\u1eafc 10:1: chi\u1ec1u r\u1ed9ng m\u00e3 ph\u1ea3i \u00edt nh\u1ea5t 1 cm cho m\u1ed7i 10 cm kho\u1ea3ng c\u00e1ch qu\u00e9t d\u1ef1 ki\u1ebfn. V\u00ed d\u1ee5, m\u1ed9t \u00e1p ph\u00edch \u0111\u01b0\u1ee3c qu\u00e9t t\u1eeb kho\u1ea3ng c\u00e1ch 1 m\u00e9t, c\u1ea7n m\u1ed9t m\u00e3 r\u1ed9ng \u00edt nh\u1ea5t 10 cm.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-7daefbe77359\"><strong class=\"schema-faq-question\">\u0110\u1ecbnh d\u1ea1ng t\u1ec7p n\u00e0o t\u00f4i n\u00ean s\u1eed d\u1ee5ng khi g\u1eedi m\u00e3 QR \u0111\u1ec3 in?<\/strong> <p class=\"schema-faq-answer\">Lu\u00f4n s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng vector \u2013 SVG, EPS, ho\u1eb7c PDF \u2013 cho vi\u1ec7c in. T\u1ec7p vector c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh k\u00edch th\u01b0\u1edbc b\u1ea5t k\u1ef3 m\u00e0 kh\u00f4ng b\u1ecb m\u1edd ho\u1eb7c v\u1ee1 h\u1ea1t. N\u1ebfu b\u1ea1n b\u1eaft bu\u1ed9c ph\u1ea3i s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng raster nh\u01b0 PNG, h\u00e3y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ph\u00e2n gi\u1ea3i \u00edt nh\u1ea5t 300 DPI \u1edf k\u00edch th\u01b0\u1edbc in cu\u1ed1i c\u00f9ng. T\u1ec7p raster c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn m\u00e3 QR in ra kh\u00f4ng \u0111\u1ecdc \u0111\u01b0\u1ee3c.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-8c55fd95b260\"><strong class=\"schema-faq-question\">L\u00e0m sao t\u00f4i bi\u1ebft n\u1ebfu m\u00e3 QR c\u1ee7a t\u00f4i s\u1ebd qu\u00e9t \u0111\u01b0\u1ee3c sau khi in m\u00e0 kh\u00f4ng c\u1ea7n ch\u1ea1y m\u1ed9t l\u1ec7nh in \u0111\u1ea7y \u0111\u1ee7?<\/strong> <p class=\"schema-faq-answer\">In m\u1ed9t b\u1ea3n in th\u1eed duy nh\u1ea5t v\u1edbi k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c d\u1ef1 \u0111\u1ecbnh tr\u00ean v\u1eadt li\u1ec7u ch\u00ednh x\u00e1c b\u1ea1n \u0111\u1ecbnh s\u1eed d\u1ee5ng, sau \u0111\u00f3 ki\u1ec3m tra n\u00f3 tr\u00ean \u00edt nh\u1ea5t hai thi\u1ebft b\u1ecb kh\u00e1c nhau (iOS v\u00e0 Android) trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng th\u1ef1c t\u1ebf. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u1ea3i l\u00ean m\u1ed9t h\u00ecnh \u1ea3nh m\u00e3 c\u1ee7a b\u1ea1n l\u00ean Pageloot QR Code Scanner \u0111\u1ec3 x\u00e1c minh n\u00f3 gi\u1ea3i m\u00e3 \u0111\u00fang tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o in. S\u1eed d\u1ee5ng m\u00e3 QR \u0111\u1ed9ng th\u00eam m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 kh\u00e1c \u2013 n\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 \u0111i\u1ec1u g\u00ec c\u1ea7n thay \u0111\u1ed5i sau khi in, b\u1ea1n c\u00f3 th\u1ec3 c\u1eadp nh\u1eadt \u0111\u00edch \u0111\u1ebfn m\u00e0 kh\u00f4ng c\u1ea7n in l\u1ea1i.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>Ng\u0103n ch\u1eb7n l\u1ed7i m\u00e3 QR b\u1eb1ng c\u00e1ch ki\u1ec3m tra tr\u01b0\u1edbc khi b\u1ea1n in. T\u00ecm hi\u1ec3u quy t\u1eafc k\u00edch th\u01b0\u1edbc 10:1, \u0111\u1ecbnh d\u1ea1ng t\u1ec7p t\u1ed1i \u01b0u, t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n v\u00e0 ki\u1ec3m tra v\u00f9ng y\u00ean t\u0129nh cho m\u1ed7i l\u1ea7n ch\u1ea1y.<\/p>","protected":false},"author":17,"featured_media":55334,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-55443","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Test a QR Code Before Printing<\/title>\n<meta name=\"description\" content=\"Prevent QR code failure by testing before you print. 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V\u1edbi chuy\u00ean m\u00f4n s\u00e2u s\u1eafc k\u00e9o d\u00e0i h\u01a1n 5 n\u0103m ch\u1ec9 v\u1ec1 m\u00e3 QR, Siim \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t chuy\u00ean gia v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y trong l\u0129nh v\u1ef1c n\u00e0y. Anh \u1ea5y \u0111\u00e3 c\u00f3 nh\u1eefng b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 QR \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a v\u00e0 t\u0103ng c\u01b0\u1eddng c\u00e1c t\u01b0\u01a1ng t\u00e1c k\u1ef9 thu\u1eadt s\u1ed1. Cu\u1ed9c h\u00e0nh tr\u00ecnh c\u1ee7a anh kh\u00f4ng ch\u1ec9 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2y. Siim c\u00f3 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 s\u00e2u r\u1ed9ng v\u1edbi h\u01a1n 10 n\u0103m kinh nghi\u1ec7m v\u1eefng ch\u1eafc trong l\u0129nh v\u1ef1c Ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), m\u1ed9t minh ch\u1ee9ng cho ki\u1ebfn th\u1ee9c s\u00e2u r\u1ed9ng c\u1ee7a \u00f4ng v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt s\u1ed1.","sameAs":["https:\/\/www.linkedin.com\/in\/siim-tiigimagi\/"]},{"@type":"Question","@id":"https:\/\/pageloot.com\/how-to\/test-a-qr-code-before-printing\/#faq-question-e0da87b2fc17","position":1,"url":"https:\/\/pageloot.com\/how-to\/test-a-qr-code-before-printing\/#faq-question-e0da87b2fc17","name":"K\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u m\u1ed9t m\u00e3 QR n\u00ean l\u00e0 bao nhi\u00eau \u0111\u1ec3 in?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The reliable minimum for close-range scanning \u2013 such as on business cards or product labels \u2013 is 2 \u00d7 2 cm (0.8 \u00d7 0.8 inches). For larger print materials, apply the 10:1 rule: the code width should be at least 1 cm for every 10 cm of expected scanning distance. A poster scanned from 1 meter away, for example, needs a code at least 10 cm wide.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/how-to\/test-a-qr-code-before-printing\/#faq-question-7daefbe77359","position":2,"url":"https:\/\/pageloot.com\/how-to\/test-a-qr-code-before-printing\/#faq-question-7daefbe77359","name":"\u0110\u1ecbnh d\u1ea1ng t\u1ec7p n\u00e0o t\u00f4i n\u00ean s\u1eed d\u1ee5ng khi g\u1eedi m\u00e3 QR \u0111\u1ec3 in?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Always use a vector format \u2013 SVG, EPS, or PDF \u2013 for print. Vector files scale to any size without becoming blurry or pixelated. If you must use a raster format like PNG, ensure the resolution is at least 300 DPI at the final print size. Low-resolution raster files are one of the most common causes of unreadable printed QR codes.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/how-to\/test-a-qr-code-before-printing\/#faq-question-8c55fd95b260","position":3,"url":"https:\/\/pageloot.com\/how-to\/test-a-qr-code-before-printing\/#faq-question-8c55fd95b260","name":"L\u00e0m sao t\u00f4i bi\u1ebft n\u1ebfu m\u00e3 QR c\u1ee7a t\u00f4i s\u1ebd qu\u00e9t \u0111\u01b0\u1ee3c sau khi in m\u00e0 kh\u00f4ng c\u1ea7n ch\u1ea1y m\u1ed9t l\u1ec7nh in \u0111\u1ea7y \u0111\u1ee7?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Print a single proof at the exact intended size on the exact material you plan to use, then test it on at least two different devices (iOS and Android) in realistic lighting conditions. You can also upload an image of your code to the Pageloot QR Code Scanner to verify it decodes correctly before going to press. Using a dynamic QR code adds another layer of protection \u2013 if anything needs to change after printing, you can update the destination without reprinting.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/55443","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/comments?post=55443"}],"version-history":[{"count":1,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/55443\/revisions"}],"predecessor-version":[{"id":55554,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/55443\/revisions\/55554"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/55334"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=55443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=55443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=55443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}