{"id":27717,"date":"2015-02-23T11:11:00","date_gmt":"2015-02-23T11:11:00","guid":{"rendered":"https:\/\/www.solopress.com\/blog\/?p=27717"},"modified":"2025-11-25T10:10:53","modified_gmt":"2025-11-25T10:10:53","slug":"cmyk-fonctionne","status":"publish","type":"post","link":"https:\/\/www.solopress.com\/blog\/fr\/print-inspiration\/cmyk-works\/","title":{"rendered":"Comment fonctionne le CMJN"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p><span style=\"font-weight: 400;\">Lorsque l'on fournit une maquette pour l'impression, le fichier final doit \u00eatre pr\u00e9par\u00e9 en CMJN afin que les couleurs puissent \u00eatre reproduites avec pr\u00e9cision sur la presse. Comprendre le fonctionnement du CMJN permet d'expliquer pourquoi il reste la norme pour les documents imprim\u00e9s.<\/span><\/p>\n<h2><b>Que signifie CMYK ?<\/b><\/h2>\n<p><a href=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-75904 size-full\" src=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435.jpg\" alt=\"\" width=\"1187\" height=\"376\" srcset=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435.jpg 1187w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435-300x95.jpg 300w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435-1024x324.jpg 1024w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435-768x243.jpg 768w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435-18x6.jpg 18w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435-696x220.jpg 696w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/Shutterstock_2572630627-scaled-e1763972771435-1068x338.jpg 1068w\" sizes=\"auto, (max-width: 1187px) 100vw, 1187px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">CMYK est le mod\u00e8le de couleur utilis\u00e9 pour l'impression. Il d\u00e9crit comment quatre encres se combinent sur le papier pour cr\u00e9er des images en couleurs. La pr\u00e9paration de la maquette en CMJN permet de maintenir les couleurs dans la gamme pouvant \u00eatre reproduite \u00e0 l'aide d'encre.<\/span><\/p>\n<h2><b>Que signifie CMYK ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">CMYK d\u00e9signe les quatre encres utilis\u00e9es dans l'impression en quadrichromie :<\/span><\/p>\n<p><span style=\"font-weight: 400;\">C : Cyan<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">M : Magenta<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Y : Jaune<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">K : Noir<\/span><\/p>\n<h2><b>Pourquoi la lettre K signifie-t-elle noir ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Le noir est repr\u00e9sent\u00e9 par K, abr\u00e9viation de Key (cl\u00e9). Cela refl\u00e8te son r\u00f4le en tant que plaque cl\u00e9 qui porte les principales informations de d\u00e9tail et d'alignement. Le cyan, le magenta et le jaune peuvent \u00eatre combin\u00e9s pour produire des tons fonc\u00e9s, mais le r\u00e9sultat est faible, de sorte que l'encre noire est ajout\u00e9e pour donner de la profondeur et de la clart\u00e9.<\/span><\/p>\n<h2><b>Comment fonctionne le CMJN ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Le CMYK utilise un mod\u00e8le de couleur soustractif. Les encres cyan, magenta et jaune absorbent une partie de la lumi\u00e8re blanche qui se refl\u00e8te sur le papier. En variant les quantit\u00e9s de ces encres, il est possible de produire une large gamme de couleurs. L'encre noire renforce les ombres et le texte, car les trois encres color\u00e9es ne peuvent \u00e0 elles seules cr\u00e9er un noir neutre et fort.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dans l'impression num\u00e9rique comme dans la lithographie, l'image est d\u00e9compos\u00e9e en minuscules points de trame de cyan, magenta, jaune et noir. Les presses num\u00e9riques placent ces points directement. Les presses lithographiques les transf\u00e8rent \u00e0 partir de plaques m\u00e9talliques par l'interm\u00e9diaire d'un blanchet en caoutchouc. Bien que les proc\u00e9d\u00e9s diff\u00e8rent, ils reposent tous deux sur la m\u00eame structure de points, que l'\u0153il lit comme une couleur continue.<\/span><\/p>\n<h2><b>Comment un mod\u00e8le soustractif permet-il d'obtenir des r\u00e9sultats en couleur ?<\/b><\/h2>\n<p><a href=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1982499416.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-75906\" src=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1982499416.jpg\" alt=\"\" width=\"620\" height=\"438\" srcset=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1982499416.jpg 500w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1982499416-300x212.jpg 300w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1982499416-18x12.jpg 18w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1982499416-100x70.jpg 100w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">Un mod\u00e8le soustractif fonctionne en absorbant des longueurs d'onde sp\u00e9cifiques de la lumi\u00e8re :<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le blanc moins le rouge produit du cyan<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Le blanc moins le vert donne le magenta<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Le blanc moins le bleu donne le jaune<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La superposition de ces encres permet de contr\u00f4ler la quantit\u00e9 de lumi\u00e8re renvoy\u00e9e \u00e0 l'observateur. L'ajout de noir \u00e9largit la gamme des tons fonc\u00e9s et renforce les d\u00e9tails fins.<\/span><\/p>\n<h2><b>Qu'est-ce que le tramage ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">La trame utilise des points de taille et d'espacement variables pour reproduire une couleur continue. Une teinte plus claire utilise des points plus petits ou plus espac\u00e9s. Une teinte plus fonc\u00e9e utilise des points plus grands ou plus rapproch\u00e9s. Lorsqu'ils sont observ\u00e9s \u00e0 une distance normale, les points se fondent visuellement, cr\u00e9ant des d\u00e9grad\u00e9s lisses et des images en couleurs.<\/span><\/p>\n<h2><b>Pourquoi le noir est-il consid\u00e9r\u00e9 comme la couleur cl\u00e9 dans le syst\u00e8me CMJN ?<\/b><\/h2>\n<p><a href=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine-.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-75908\" src=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine-.png\" alt=\"\" width=\"1474\" height=\"812\" srcset=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine-.png 1474w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--300x165.png 300w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--1024x564.png 1024w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--768x423.png 768w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--18x10.png 18w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--762x420.png 762w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--696x383.png 696w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/cmyk-machine--1068x588.png 1068w\" sizes=\"auto, (max-width: 1474px) 100vw, 1474px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">Le noir permet d'imprimer des textes fins, des bords nets et des d\u00e9tails dans les ombres. Il produit des tons plus fonc\u00e9s qu'un m\u00e9lange de cyan, de magenta et de jaune, et permet de g\u00e9rer la couverture d'encre. L'utilisation des trois encres de couleur seules n\u00e9cessiterait d'importantes couches d'encre, ce qui ralentirait le s\u00e9chage et augmenterait le risque de saignement sur le papier.<\/span><\/p>\n<h2><b>Qu'est-ce qu'une gamme de couleurs ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">La gamme de couleurs est la gamme de couleurs qu'un appareil peut reproduire. Les \u00e9crans, les appareils photo et les imprimantes ont chacun leur propre gamme en fonction de la mani\u00e8re dont ils cr\u00e9ent ou enregistrent les couleurs. Un \u00e9cran peut afficher des couleurs plus satur\u00e9es parce qu'il \u00e9met de la lumi\u00e8re, alors que l'impression repose sur la lumi\u00e8re r\u00e9fl\u00e9chie et un ensemble limit\u00e9 d'encres.<\/span><\/p>\n<h2><b>En quoi la gamme de couleurs CMYK diff\u00e8re-t-elle de la gamme RVB ?<\/b><\/h2>\n<p><a href=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-75900\" src=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK.png\" alt=\"\" width=\"984\" height=\"514\" srcset=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK.png 984w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK-300x157.png 300w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK-768x401.png 768w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK-18x9.png 18w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK-804x420.png 804w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/RGB-CMYK-696x364.png 696w\" sizes=\"auto, (max-width: 984px) 100vw, 984px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">La gamme RVB est plus large que la gamme CMJN. Il permet d'afficher des couleurs vives et n\u00e9on qui ne sont pas r\u00e9alisables avec de l'encre. La gamme CMJN est plus \u00e9troite car elle est limit\u00e9e par la fa\u00e7on dont les quatre encres absorbent et refl\u00e8tent la lumi\u00e8re.<\/span><\/p>\n<h2><b>Quelles sont les diff\u00e9rences entre CMYK et RGB ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Le RVB est un mod\u00e8le de couleur additif utilis\u00e9 par les \u00e9crans. Les lumi\u00e8res rouge, verte et bleue se combinent pour cr\u00e9er l'image finale. CMYK est un mod\u00e8le soustractif utilis\u00e9 pour l'impression. Les encres cyan, magenta, jaune et noire absorbent la lumi\u00e8re pour cr\u00e9er des couleurs sur une surface blanche. Les deux mod\u00e8les fonctionnant diff\u00e9remment, les couleurs qui apparaissent brillantes \u00e0 l'\u00e9cran peuvent changer lorsqu'elles sont converties dans la gamme CMJN plus limit\u00e9e.<\/span><\/p>\n<h2><b>Pourquoi pr\u00e9parer une maquette en CMJN pour l'impression ?<\/b><\/h2>\n<p><a href=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1029406984.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-75902\" src=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1029406984.jpg\" alt=\"\" width=\"688\" height=\"458\" srcset=\"https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1029406984.jpg 500w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1029406984-300x200.jpg 300w, https:\/\/www.solopress.com\/blog\/wp-content\/uploads\/2015\/02\/shutterstock_1029406984-18x12.jpg 18w\" sizes=\"auto, (max-width: 688px) 100vw, 688px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">Le travail de conception s'effectue sur des \u00e9crans, de sorte que les \u0153uvres d'art sont toujours visualis\u00e9es en RVB lors de leur cr\u00e9ation. Ce qui compte, c'est le mode de couleur du document final. La configuration du fichier en CMJN maintient les couleurs dans la gamme pouvant \u00eatre reproduite \u00e0 l'aide d'encre. Les valeurs RVB vives, telles que les n\u00e9ons et les tons satur\u00e9s intenses, se situent souvent en dehors de la gamme CMJN. Si la conversion n'a lieu qu'au moment de l'exportation, le d\u00e9calage peut \u00eatre important.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pr\u00e9parer le fichier en CMJN d\u00e8s le d\u00e9part r\u00e9duit ces surprises et permet au r\u00e9sultat imprim\u00e9 de rester proche de la conception pr\u00e9vue.<\/span><\/p>\n<h2><b>Que sont les profils ICC et pourquoi sont-ils importants ?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Les profils ICC d\u00e9crivent la mani\u00e8re dont un appareil sp\u00e9cifique affiche ou reproduit les couleurs. Chaque moniteur, chaque presse et chaque flux de travail d'\u00e9preuvage se comporte l\u00e9g\u00e8rement diff\u00e9remment. L'application du bon profil ICC \u00e0 votre maquette aide le processus d'impression \u00e0 interpr\u00e9ter vos couleurs aussi pr\u00e9cis\u00e9ment que possible au sein du CMJN. Cela r\u00e9duit le risque de d\u00e9calages inattendus lors de la conversion \u00e0 partir de RVB.<\/span><\/p>\n<h2><b>Contr\u00f4les finaux avant la fourniture de la maquette<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Avant d'exporter votre maquette, v\u00e9rifiez que le document est r\u00e9gl\u00e9 sur CMYK, que tous les \u00e9l\u00e9ments RVB ont \u00e9t\u00e9 convertis et que le profil ICC correct a \u00e9t\u00e9 appliqu\u00e9. Cela donne \u00e0 la presse les informations dont elle a besoin pour reproduire vos couleurs de mani\u00e8re fiable. <\/span>Pour en savoir plus sur la configuration de vos fichiers en CMJN et sur d'autres choses \u00e0 faire avant de soumettre votre maquette \u00e0 l'impression, consultez notre site Web. <a href=\"https:\/\/www.solopress.com\/blog\/fr\/support-guides\/supplying-artwork\/\">page sur la fourniture d'une maquette<\/a>.<\/p>\n<h2><strong>Pr\u00eat \u00e0 imprimer ? <\/strong><\/h2>\n<p>De <a href=\"https:\/\/www.solopress.com\/blog\/fr\/cartes-daffaires\/\">cartes de visite<\/a> \u00e0 <a href=\"https:\/\/www.solopress.com\/blog\/fr\/depliants-depliants\/\">d\u00e9pliants et brochures<\/a> vous trouverez tout ce dont vous avez besoin chez Solopress.<\/p>","protected":false},"excerpt":{"rendered":"<p>When supplying artwork for print, the final file must be prepared in CMYK so colours can be reproduced accurately on press. Understanding how CMYK works helps explain why it remains the standard for printed materials. What does CMYK mean? CMYK is the colour model used for print. It describes how four inks combine on paper [&hellip;]<\/p>\n","protected":false},"author":158,"featured_media":75909,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[544],"tags":[],"class_list":{"0":"post-27717","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-print-inspiration"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How CMYK Works | Solopress<\/title>\n<meta name=\"description\" content=\"What is CMYK and how does it work? 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