{"id":3714,"date":"2017-01-02T19:30:13","date_gmt":"2017-01-02T19:30:13","guid":{"rendered":"http:\/\/impressionorig.wpengine.com\/fr\/decipher-quadrichromia-printing-process\/"},"modified":"2017-04-18T15:01:42","modified_gmt":"2017-04-18T15:01:42","slug":"petite-lecon-de-quadrichromie","status":"publish","type":"post","link":"https:\/\/www.impressionoriginale.com\/fr\/petite-lecon-de-quadrichromie\/","title":{"rendered":"Petite Le\u00e7on de Quadrichromie"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column]<>Le Proc\u00e9d\u00e9 d'Impression Quadrichromie<\/><h6>On vous r\u00e9v\u00e8le la technique<\/h6>[vc_video link=\u00a0\u00bbhttps:\/\/youtu.be\/CdcJb9YydgQ?t=4\u2033 align=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column]<h6>Back to Greece<\/h6><h4>Ethymologie<\/h4>[vc_column_text]<\/p>\n<p style=\"text-align: justify;\">Le terme quadrichromie a \u00e9t\u00e9 construit \u00e0 la fin du\u00a0xix<sup>e<\/sup>\u00a0si\u00e8cle\u00a0\u00e0 partir d\u2019une racine\u00a0latine,\u00a0<em>quadri<\/em>, \u00ab\u00a0de quatre\u00a0\u00bb et d\u2019une\u00a0grecque,\u00a0<em>chromia<\/em>, couleur. Les fondements techniques ont \u00e9t\u00e9 pos\u00e9s au XVIII<sup>e<\/sup>\u00a0si\u00e8cle par\u00a0Jacob Christoph Le Blon. La presse a ensuite commenc\u00e9 \u00e0 largement utiliser la quadrichromie \u00e0 partir de 1880.<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/3\u2033][vc_single_image image=\u00a0\u00bb3663\u2033 img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3\u2033][vc_single_image image=\u00a0\u00bb3661\u2033 img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3\u2033][vc_single_image image=\u00a0\u00bb3659\u2033 img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column]<h6>En d\u00e9tails<\/h6><h4>La Quadrichromie : Qu\u2019est-ce que c\u2019est ?<\/h4>[vc_column_text]<\/p>\n<p style=\"text-align: justify;\">La quadrichromie est un proc\u00e9d\u00e9 d\u2019impression qui utilise quatre couleurs\u00a0: les trois couleurs primaires qui sont\u00a0: le jaune, le rouge (magenta), et le bleu (cyan), plus un noir pour renforcer les contrastes et reproduire le texte (<a href=\"http:\/\/www.larousse.fr\/dictionnaires\/francais\/quadrichromie\/65408#0mCxePYwLWkWlPeB.99\" target=\"_blank\">Larousse<\/a>, 2016).<\/p>\n<p style=\"text-align: justify;\">La qualit\u00e9 d\u2019impression en quadrichromie permet de contr\u00f4ler le dosage des couleurs et de reproduire avec une pr\u00e9cision fine les couleurs souhait\u00e9es. Le r\u00e9sultat est sup\u00e9rieur \u00e0 une impression num\u00e9rique, car l\u2019encre est d\u00e9pos\u00e9e par couches successives et est imm\u00e9diatement s\u00e9ch\u00e9e \u00e0 la sortie. On obtient ainsi une impression de couleurs pr\u00e9sentant une r\u00e9elle profondeur.<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/2\u2033]<h6>Un proc\u00e9d\u00e9 en plusieurs \u00e9tapes<\/h6><h4>Proc\u00e9d\u00e9s d\u2019imprimerie<\/h4>[vc_column_text]<\/p>\n<p style=\"text-align: justify;\">Pour reproduire sur une\u00a0page imprim\u00e9e\u00a0une image en couleur, il faut la d\u00e9composer en couleurs de base : rouge (magenta), jaune et bleu (cyan). Pour ce faire on photographie l\u2019image en intercalant \u00e0 chaque op\u00e9ration un filtre de la couleur compl\u00e9mentaire : filtre violet pour s\u00e9lectionner le jaune, filtre vert pour s\u00e9lectionner le rouge, filtre orange pour le bleu.<\/p>\n<p style=\"text-align: justify;\">Pour restituer \u00e0 l\u2019oeil une image identique \u00e0 l\u2019originale, les clich\u00e9s sont imprim\u00e9s par exacte superposition avec les encres dites primaires : cyan, magenta et jaune. La couleur noire est essentiellement utilis\u00e9e pour renforcer le dessin et augmenter les intensit\u00e9s dans les parties sombres.<\/p>\n<p>[\/vc_column_text][\/vc_column][vc_column width=\u00a0\u00bb1\/2\u2033][vc_single_image image=\u00a0\u00bb3668\u2033 img_size=\u00a0\u00bbfull\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/2\u2033]<h6>Couleurs Primaires + Noir<\/h6><h4>Comment obtient-on les couleurs ?<\/h4>[vc_column_text]<\/p>\n<p style=\"text-align: justify;\">En fonction de la teinte de la couleur d\u00e9sir\u00e9e, le d\u00e9p\u00f4t de l\u2019encre en pois est plus ou moins dense avec des tailles de pois qui varient. Il s\u2019agit de la <strong>trame<\/strong>. Par ailleurs, pour chaque couleur, la trame a une orientation diff\u00e9rente pour permettre des micro-juxtapositions, invisibles \u00e0 l\u2019\u0153il, qui permettent de cr\u00e9er une palette de couleurs tr\u00e8s large.<\/p>\n<p style=\"text-align: justify;\">A l\u2019aide d\u2019un <strong>compte-fi<\/strong><strong>l<\/strong> (ou plus commun\u00e9ment, une loupe d\u2019imprimerie) on distingue les micro points des quatre trames de couleurs utilis\u00e9es dans la quadrichromie.<\/p>\n<p>[\/vc_column_text][\/vc_column][vc_column width=\u00a0\u00bb1\/2\u2033][vc_single_image image=\u00a0\u00bb3671\u2033 img_size=\u00a0\u00bblarge\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column]<h6>Une longue pr\u00e9paration<\/h6><h4>Les limites du proc\u00e9d\u00e9<\/h4>[vc_column_text]<\/p>\n<p style=\"text-align: justify;\">La premi\u00e8re limite du proc\u00e9d\u00e9 d\u2019impression en quadrichromie en terme de production pure est un manque de flexibilit\u00e9, dans le sens o\u00f9 chaque tirage n\u00e9cessite un temps de pr\u00e9paration incompressible en particulier pour la gravure des quatre plaques qui vont servir \u00e0 l\u2019impression. L\u2019impression en quadrichromie n\u2019est donc pas adapt\u00e9e \u00e0 des petites quantit\u00e9s de tirages (inf\u00e9rieure \u00e0 800 feuilles).<\/p>\n<p style=\"text-align: justify;\">La seconde limite est plus technique et concerne certaines couleurs. Bien que comme mentionn\u00e9, la palette des couleurs soit quasiment infinie, certaines couleurs peuvent manquer d\u2019une certaine intensit\u00e9. C\u2019est le cas, pour la couleur orange et rose et pour les couleurs fluo qui ne sont pas reproduisibles en quadrichromie. Dans ce cas, l\u2019utilisation d\u2019encre norm\u00e9e (PANTONE \u00a9) est recommand\u00e9e pour obtenir des r\u00e9sultats optimis\u00e9s.<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=\u00a0\u00bb3718\u2033 img_size=\u00a0\u00bbfull\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column]<h6>Pour Aller plus Loin<\/h6><h4>Ouvrage de R\u00e9f\u00e9rence<\/h4>[vc_column_text]Mark Gatter, <a href=\"https:\/\/books.google.co.uk\/books?id=Pva2EkbmBYEC&amp;pg=PA31&amp;lpg=PA31&amp;ots=OcF8GmRhUr&amp;sig=4jL0kGyhFXbohJ7rznXl1QHfNhQ&amp;redir_esc=y&amp;hl=fr#v=onepage&amp;q&amp;f=false\" target=\"_blank\"><strong>Getting it right in Print<\/strong><\/a> \/ Digital Pre-press for graphic designers (<em>disponible uniquement en anglais<\/em>).[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_video link=\u00a0\u00bbhttps:\/\/youtu.be\/CdcJb9YydgQ?t=4\u2033 align=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text] Le terme quadrichromie a \u00e9t\u00e9 construit \u00e0 la fin du\u00a0xixe\u00a0si\u00e8cle\u00a0\u00e0 partir d\u2019une racine\u00a0latine,\u00a0quadri, \u00ab\u00a0de quatre\u00a0\u00bb et d\u2019une\u00a0grecque,\u00a0chromia, couleur. Les fondements techniques ont \u00e9t\u00e9 pos\u00e9s au XVIIIe\u00a0si\u00e8cle par\u00a0Jacob Christoph Le Blon. La presse a ensuite commenc\u00e9 \u00e0 largement utiliser la quadrichromie \u00e0 partir de 1880. [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/3\u2033][vc_single_image image=\u00a0\u00bb3663\u2033 img_size=\u00a0\u00bbmedium\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3\u2033][vc_single_image image=\u00a0\u00bb3661\u2033 img_size=\u00a0\u00bbmedium\u00a0\u00bb [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":3666,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[428],"tags":[429,430,431,432,433,434,435],"class_list":["post-3714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-behind-the-scenes-fr","tag-colours-fr","tag-explanation-fr","tag-high-quality-fr","tag-impression-originale-fr","tag-pantone-fr","tag-printing-process-fr","tag-quadrichromia-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Petite Le\u00e7on de Quadrichromie - Impression Originale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.impressionoriginale.com\/fr\/petite-lecon-de-quadrichromie\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Petite Le\u00e7on de Quadrichromie - Impression Originale\" \/>\n<meta property=\"og:description\" content=\"[vc_row][vc_column][vc_video link=\u00a0\u00bbhttps:\/\/youtu.be\/CdcJb9YydgQ?t=4\u2033 align=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text] Le terme quadrichromie a \u00e9t\u00e9 construit \u00e0 la fin du\u00a0xixe\u00a0si\u00e8cle\u00a0\u00e0 partir d\u2019une racine\u00a0latine,\u00a0quadri, \u00ab\u00a0de quatre\u00a0\u00bb et d\u2019une\u00a0grecque,\u00a0chromia, couleur. Les fondements techniques ont \u00e9t\u00e9 pos\u00e9s au XVIIIe\u00a0si\u00e8cle par\u00a0Jacob Christoph Le Blon. La presse a ensuite commenc\u00e9 \u00e0 largement utiliser la quadrichromie \u00e0 partir de 1880. 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