{"id":371,"date":"2013-01-19T02:54:30","date_gmt":"2013-01-19T01:54:30","guid":{"rendered":"http:\/\/www.proof.de\/?p=371"},"modified":"2020-05-08T12:01:25","modified_gmt":"2020-05-08T10:01:25","slug":"mise-en-page-en-rgb-impression-en-cmyk-problemes","status":"publish","type":"post","link":"https:\/\/proof.proofen.de\/fr\/mise-en-page-en-rgb-impression-en-cmyk-problemes\/","title":{"rendered":"Mise en page en RVB, impression en CMJN. Des probl\u00e8mes ?"},"content":{"rendered":"<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-top\" data-payload='{\"align\":\"right\",\"id\":\"371\",\"slug\":\"default\",\"valign\":\"top\",\"ignore\":\"\",\"reference\":\"auto\",\"class\":\"\",\"count\":\"0\",\"legendonly\":\"\",\"readonly\":\"\",\"score\":\"0\",\"starsonly\":\"\",\"best\":\"5\",\"gap\":\"5\",\"greet\":\"Jetzt bewerten\",\"legend\":\"0\\\/5 - (0 votes)\",\"size\":\"24\",\"title\":\"Layout in RGB, Druck in CMYK. Probleme?\",\"width\":\"0\",\"_legend\":\"{score}\\\/{best} - ({count} {votes})\",\"font_factor\":\"1.25\"}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u00c9valuer maintenant<\/span>\n    <\/div>\n    <\/div>\n<p>Dans les grandes entreprises en particulier, la pr\u00e9sentation en <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/rgb\/\" target=\"_self\" title=\"RVB repr\u00e9sente les couleurs rouge, vert et bleu. La vision humaine des couleurs s&#039;appuie sur ces couleurs.\" class=\"encyclopedia\">RGB<\/a> est la r\u00e8gle plut\u00f4t que l'exception. Les avantages sont \u00e9vidents :<\/p>\n<ul>\n<li>La mise en page s'effectue dans un grand format, quasiment neutre au niveau des m\u00e9dias. <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/espace-de-couleur\/\" target=\"_self\" title=\"L&#039;espace colorim\u00e9trique est bas\u00e9 sur un mod\u00e8le de couleurs et est son application concr\u00e8te \u00e0 une m\u00e9thode de reproduction des couleurs (imprimante, \u00e9cran, etc.). Il contient donc toutes les couleurs qui peuvent \u00eatre effectivement repr\u00e9sent\u00e9es avec cette m\u00e9thode et les mat\u00e9riaux correspondants.\" class=\"encyclopedia\">Espace colorim\u00e9trique<\/a> au lieu de<\/li>\n<li>Tous les filtres Photoshop sont disponibles sans restriction<\/li>\n<li>Le processus de conversion de l'espace colorim\u00e9trique selon <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/cmyk\/\" target=\"_self\" title='CMYK d\u00e9signe les quatre couleurs d&#039;impression cyan, magenta, jaune et &quot;key&quot; (noir ou partie noire).' class=\"encyclopedia\">CMYK<\/a> est transf\u00e9r\u00e9 le plus tard possible dans le processus de production<\/li>\n<\/ul>\n<p>Dans la pratique, il y a deux probl\u00e8mes potentiels.<\/p>\n<p>Probl\u00e8me 1 : Conversion CMJN \u00e0 la derni\u00e8re \u00e9tape.<br>\nLe catalogue est mis en page dans InDesign, toutes les donn\u00e9es sont parfaitement correctes, la derni\u00e8re \u00e9tape avant l'impression et la mise en page est la mise en place d'un syst\u00e8me de gestion de la qualit\u00e9. <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/proof\/\" target=\"_self\" title=\"Une \u00e9preuve (correctement appel\u00e9e \u00e9preuve contractuelle ou en anglais Contract Proof) est un moyen de contr\u00f4le certifi\u00e9 selon la norme ISO 12647-7 pour l&#039;industrie graphique. Une \u00e9preuve simule la colorim\u00e9trie de l&#039;impression offset ou de l&#039;h\u00e9liogravure en respectant les couleurs et les tol\u00e9rances \u00e9troites de la norme ISO.\" class=\"encyclopedia\">Proof<\/a> l'exportation vers un PDF imprimable en CMJN. Normalement, cela se fait via un pr\u00e9r\u00e9glage dans InDesign, dans lequel les sp\u00e9cifications exactes pour la conversion de l'espace colorim\u00e9trique d<a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/efi\/\" target=\"_self\" title=\"Electronics For Imaging Inc., en abr\u00e9g\u00e9 EFI, est une soci\u00e9t\u00e9 am\u00e9ricaine et le fabricant de l&#039;un des principaux syst\u00e8mes d&#039;\u00e9preuvage au monde : EFI Colorproof XF, devenu Fiery XF en 2013. EFI est un fournisseur de solutions pour les syst\u00e8mes d&#039;impression grand format, les RIP et les solutions de gestion de la couleur telles que l&#039;\u00e9preuvage.\" class=\"encyclopedia\">efi<\/a>n\u00e9es par l'utilisateur. Dans la pratique, il est toutefois difficile de contr\u00f4ler ce transfert d'espace colorim\u00e9trique. Le probl\u00e8me est que, m\u00eame si vous avez modifi\u00e9 les valeurs chromatiques dans le fichier PDF export\u00e9, par exemple en Acr<a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/oba\/\" target=\"_self\" title='OBA est l&#039;abr\u00e9viation de &quot;Optical Brightning Agents&quot; ou &quot;Optical Brightners&quot;, c&#039;est-\u00e0-dire agents de blanchiment optique.' class=\"encyclopedia\">oba<\/a>t, Acrobat n'affiche pas vraiment les couleurs qu'il contient. M\u00eame si les images RVB \u00e9taient toujours incluses \u00e0 tort, Acrobat afficherait sagement les valeurs CMJN. Cependant, lors de l'impression, d'autres valeurs CMJN peuvent appara\u00eetre lorsque les donn\u00e9es sont trait\u00e9es \u00e0 nouveau. Voici ce qui s'est pass\u00e9 r\u00e9cemment :<!--more--><\/p>\n<ul>\n<li>Le client envoie des donn\u00e9es pr\u00e9tendument CMJN pour l'\u00e9preuve.<\/li>\n<li>1. livraison des donn\u00e9es : la plupart des images sont toujours en RGB. Le client ne l'a pas remarqu\u00e9 lors de la relecture dans Acrobat.<\/li>\n<li>Livraison des donn\u00e9es : donn\u00e9es en CMJN, imprimables et pr\u00eates pour l'\u00e9preuve, donc une \u00e9preuve est r\u00e9alis\u00e9e. Les donn\u00e9es ont cependant \u00e9t\u00e9 converties via un profil erron\u00e9, ce qui explique que toutes les images \u00e9taient jaun\u00e2tres. La mauvaise conversion de l'espace colorim\u00e9trique ne s'est donc r\u00e9v\u00e9l\u00e9e qu'au moment de l'\u00e9preuve.<\/li>\n<li>3. livraison des donn\u00e9es correcte. Donn\u00e9es dans l'\u00e9preuve \u00e9galement correctes.<\/li>\n<\/ul>\n<p>Un autre probl\u00e8me : la finition dans l'imprimerie<\/p>\n<ul>\n<li>Une imprimerie re\u00e7oit du client des fichiers Corel Draw qui ont \u00e9t\u00e9 mis en page en RVB et convertis en CMJN lors de l'exportation.<\/li>\n<li>Images d'origine du photographe en <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/eci\/\" target=\"_self\" title=\"L&#039;ECI - European Color Initiative est un groupe d&#039;experts qui s&#039;occupe du traitement des donn\u00e9es couleur dans les syst\u00e8mes de publication.\" class=\"encyclopedia\">ECI<\/a>-RGB-V2<\/li>\n<li>Corel du designer qui reprend les images du photographe r\u00e9gl\u00e9 sur <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/srgb\/\" target=\"_self\" title=\"sRGB est l&#039;espace colorim\u00e9trique RVB le plus r\u00e9pandu. sRGB est l&#039;espace colorim\u00e9trique standard de tous les appareils photo num\u00e9riques et scanners bon march\u00e9. Presque tous les fichiers RVB 8 bits sans indicateur de profil sont conformes \u00e0 sRVB.\" class=\"encyclopedia\">sRGB<\/a><\/li>\n<li>L'exportation se fait vers un PDF CMJN. Le designer ne sait pas si ses surfaces vectorielles Corel en noir RVB ont \u00e9t\u00e9 calcul\u00e9es diff\u00e9remment des images RVB int\u00e9gr\u00e9es par le photographe, dont le noir est masqu\u00e9 par un masque de calque sur ces m\u00eames surfaces vectorielles.<\/li>\n<li>Le retour de l'imprimerie apr\u00e8s r\u00e9ception des donn\u00e9es : le noir a trop de <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/application-de-peinture\/\" target=\"_self\" title=\"Le d\u00e9p\u00f4t d&#039;encre en impression fait r\u00e9f\u00e9rence \u00e0 la quantit\u00e9 d&#039;encre appliqu\u00e9e sur une surface d&#039;impression. Il est \u00e9galement appel\u00e9 d\u00e9p\u00f4t d&#039;encre ou densit\u00e9 d&#039;encre. Le d\u00e9p\u00f4t d&#039;encre est un param\u00e8tre important dans le processus d&#039;impression, car il influence l&#039;intensit\u00e9 et la saturation des couleurs. Un d\u00e9p\u00f4t d&#039;encre \u00e9lev\u00e9 peut donner des couleurs plus intenses et une plus grande saturation, mais...\" class=\"encyclopedia\">Application de peinture<\/a>. Le client et le concepteur sont compl\u00e8tement d\u00e9sempar\u00e9s. En effet, personne ne sait vraiment comment Corel g\u00e8re les donn\u00e9es RVB - \u00e9ventuellement profil\u00e9es ou non - lors de l'exportation en CMJN.<\/li>\n<\/ul>\n<p>Il faut bien l'avouer : Avec un flux de travail CMJN, de tels probl\u00e8mes ne se seraient jamais pos\u00e9s. Le CMJN est le plus petit d\u00e9nominateur commun entre l'agence, le photographe et l'imprimeur. N\u00e9anmoins, je privil\u00e9gie le flux de travail RVB pour l'avenir. Utilis\u00e9 et mis en place correctement, il offre la possibilit\u00e9 d'obtenir des r\u00e9sultats d'impression nettement meilleurs, car la conversion en CMJN peut \u00eatre effectu\u00e9e le plus tard possible. Mais cela signifie \u00e9galement que le savoir-faire en mati\u00e8re de gestion de la couleur doit \u00eatre disponible dans les \u00e9tapes du processus \"le plus tard possible\". Et c'est l\u00e0 que de nombreuses imprimeries doivent s'adapter. En effet, la plupart des imprimeries - m\u00eame les plus grandes - proc\u00e8dent selon ce principe :<\/p>\n<p>&ldquo;Da kam mal einer, der hat das <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/ctp\/\" target=\"_self\" title='Le CTP est le proc\u00e9d\u00e9 &quot;computer-to-plate&quot;, dans lequel les plaques d&#039;impression sont produites directement dans une flasheuse CTP sans l&#039;aide de films. Il est plus rapide et plus pr\u00e9cis, mais aussi plus cher que le proc\u00e9d\u00e9 classique CTF - &quot;Computer-to-Film&quot;.' class=\"encyclopedia\">CTP<\/a> a \u00e9t\u00e9 install\u00e9. Au bout de trois jours, il a disparu et depuis, cela fonctionne. On met des donn\u00e9es \u00e0 l'avant et des disques sortent \u00e0 l'arri\u00e8re. Ce qu'il y a entre les deux ? Je ne sais pas. Pourquoi ?\"<\/p>\n<p>C'est ce qui est arriv\u00e9 r\u00e9cemment \u00e0 un client. Pour l'impression d'une brochure avec des photographies en noir profond, l'imprimeur lui a demand\u00e9 d'appliquer les images de mani\u00e8re \u00e0 ce que le noir soit de 40\/0\/0\/100.<\/p>\n<p>Je vous l'accorde : Le fait qu'un noir profond puisse avoir un m\u00e9lange de CYAN \u00e9tait certainement enseign\u00e9 il y a 30 ans \u00e0 l'\u00e9cole professionnelle. Et 40\/0\/0\/100 est aussi un noir. Mais demander \u00e0 un photographe d'ajuster ses images RVB \u00e0 ce niveau de noir n'est pas vraiment pertinent. Mais c'est exactement ce qui s'est pass\u00e9 avec un client. Conclusion : le RVB est une bonne chose, mais il n'a pas encore \u00e9t\u00e9 adopt\u00e9 par tous les imprimeurs. Mais les imprimeurs qui savent voir plus loin que le bout de leur nez se sont certainement d\u00e9j\u00e0 pench\u00e9s sur la question.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dans les grandes entreprises en particulier, la mise en page en RVB est aujourd'hui la r\u00e8gle plut\u00f4t que l'exception. Les avantages sont \u00e9vidents : la mise en page s'effectue dans un espace colorim\u00e9trique large et presque neutre pour les m\u00e9dias Tous les filtres Photoshop sont disponibles sans restriction Le processus de conversion de l'espace colorim\u00e9trique en CMJN est d\u00e9plac\u00e9 le plus tard possible dans le processus de production Dans la pratique, des probl\u00e8mes potentiels se posent toutefois \u00e0 deux endroits en particulier. Probl\u00e8me 1 : Conversion CMJN \u00e0 la derni\u00e8re \u00e9tape. Le catalogue est mis en page dans InDesign, toutes les donn\u00e9es sont parfaitement correctes, la derni\u00e8re \u00e9tape avant ... <\/p>\n<p class=\"read-more-container\"><a title=\"Mise en page en RVB, impression en CMJN. Des probl\u00e8mes ?\" class=\"read-more button\" href=\"https:\/\/proof.proofen.de\/fr\/mise-en-page-en-rgb-impression-en-cmyk-problemes\/#more-371\" aria-label=\"Read more about Layout in RGB, Druck in CMYK. Probleme?\">Lire la suite<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1,435,443,441,7],"tags":[529,232,230,231,541,543,233],"class_list":["post-371","post","type-post","status-publish","format-standard","hentry","category-allgemein","category-farbraeume-und-farbprofile","category-haeufige-fragen-zu-proofs","category-layout-tipps-und-tricks","category-proof-wissen","tag-cmyk","tag-cmyk-konvertierung","tag-lab","tag-medienneutral","tag-rgb","tag-softproof","tag-workflow","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","no-featured-image-padding"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Mit PDFX\/4 und dem Wunsch nach medienneutraler Bearbeitung von Bildern und Farben werden Workflows auf RGB und LAB umgestellt. 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