{"id":704,"date":"2013-12-11T17:26:10","date_gmt":"2013-12-11T16:26:10","guid":{"rendered":"http:\/\/www.proof.de\/?post_type=encyclopedia&p=704"},"modified":"2022-03-15T10:18:40","modified_gmt":"2022-03-15T09:18:40","slug":"cmyk","status":"publish","type":"encyclopedia","link":"https:\/\/www.proof.de\/cs\/lexikon\/cmyk\/","title":{"rendered":"CMYK"},"content":{"rendered":"
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\n Hodnotit nyn\u00ed<\/span>\n <\/div>\n <\/div>\n

CMYK<\/strong> ozna\u010duje \u010dty\u0159i tiskov\u00e9 barvy C<\/strong>yan, M<\/strong>agenta, Y<\/strong>ellow (\u017elut\u00e1) a \"K<\/strong>ey\" (\u010dern\u00e1 nebo \u010dern\u00e1 \u010d\u00e1st). Tyto \u010dty\u0159i tiskov\u00e9 barvy tvo\u0159\u00ed z\u00e1klad \u010dty\u0159barevn\u00e9ho tisku. Pro tisk barevn\u00fdch fotografi\u00ed jsou zapot\u0159eb\u00ed alespo\u0148 tyto \u010dty\u0159i tiskov\u00e9 barvy.<\/p>\n

CMYK je subtraktivn\u00ed barevn\u00fd model<\/a>: barvy se vytv\u00e1\u0159ej\u00ed pohlcov\u00e1n\u00edm sv\u011btla. P\u0159i tisku se barvy nan\u00e1\u0161ej\u00ed na b\u00edl\u00fd pap\u00edr a r\u016fzn\u00e9 barvy pohlcuj\u00ed r\u016fzn\u00e9 \u010d\u00e1sti sv\u011btla, aby se dos\u00e1hlo po\u017eadovan\u00e9 barvy. Kombinac\u00ed azurov\u00e9, purpurov\u00e9 a \u017elut\u00e9 barvy lze vytvo\u0159it \u0161irok\u00e9 spektrum barev<\/a>.<\/p>\n

Barevn\u00e9 prostory CMYK z\u00e1vis\u00ed na p\u0159\u00edslu\u0161n\u00e9 tisk\u00e1rn\u011b a pou\u017eit\u00e9m pap\u00edru, a proto vy\u017eaduj\u00ed barevn\u00e9 profily<\/a> pro p\u0159esn\u00fd popis reprodukce barev.<\/p>\n

Kvalitn\u00ed obrazov\u00e9 bro\u017eury na pap\u00edru pro tisk obraz\u016f<\/a> se vyr\u00e1b\u011bj\u00ed v CMYK \u00fapln\u011b stejn\u011b jako levn\u00e9 inzertn\u00ed noviny ve velk\u00e9m n\u00e1kladu, ale reprodukce barev je zcela jin\u00e1. Pokud by byl nap\u0159\u00edklad obr\u00e1zek vyti\u0161t\u011bn s identick\u00fdmi hodnotami CMYK jak ve vysoce kvalitn\u00ed obrazov\u00e9 bro\u017eu\u0159e, tak v novinov\u00e9m tisku, v\u00fdsledek tisku by byl jist\u011b zcela odli\u0161n\u00fd. V obrazov\u00e9 bro\u017eu\u0159e je dosa\u017eeno hlubok\u00e9 \u010dern\u00e9 a syt\u00fdch barev, zat\u00edmco barevnost v novinov\u00e9m tisku je velmi bled\u00e1 a nelze dos\u00e1hnout \u017e\u00e1dn\u00e9 hlubok\u00e9 \u010dern\u00e9, pouze \"tmav\u011b \u0161ed\u00e9\" jako nejtmav\u0161\u00edho t\u00f3nu tisku.<\/p>\n

Tyto rozd\u00edly v reprodukci barev lze mapovat pomoc\u00ed profil\u016f CMYK proof<\/a>, a t\u00edm je \u010d\u00e1ste\u010dn\u011b p\u0159izp\u016fsobit i tisku. Pokud je nap\u0159\u00edklad stejn\u00fd RGB<\/a> obr\u00e1zek odd\u011blen jednou pro kvalitn\u00ed obrazovou bro\u017euru podle PSO<\/a>CoatedV3 a pro novinov\u00fd tisk podle ISONewspaper26v5, pak existuj\u00ed rozd\u00edly v dosa\u017eiteln\u00fdch gamut<\/a>, ale obr\u00e1zky jsou upraveny tak, aby se motiv barevn\u011b nelepil a \"neut\u00e1p\u011bl\", tj. aby tmav\u00e9 ton\u00e1ln\u00ed hodnoty vyb\u00edhaly.<\/p>\n

Nejd\u016fle\u017eit\u011bj\u0161\u00ed barevn\u00e9 prostory CMYK jsou:<\/p>\n