{"id":1108,"date":"2014-10-02T00:36:12","date_gmt":"2014-10-01T22:36:12","guid":{"rendered":"http:\/\/www.proof.de\/?post_type=encyclopedia&#038;p=1108"},"modified":"2025-02-20T12:06:02","modified_gmt":"2025-02-20T11:06:02","slug":"ctf","status":"publish","type":"encyclopedia","link":"https:\/\/proof.proofen.de\/nl\/lexicon-2\/ctf\/","title":{"rendered":"CTF"},"content":{"rendered":"<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-top\" data-payload='{\"align\":\"right\",\"id\":\"1108\",\"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\":\"CTF\",\"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\">Nu beoordelen<\/span>\n    <\/div>\n    <\/div>\n<p><strong>Computer to Film (CTF)<\/strong> ist ein Druckvorstufenverfahren, bei dem digitale Druckdaten auf Filmvorlagen &uuml;bertragen werden, die dann zur Herstellung von Druckplatten verwendet werden. CTF war lange Zeit das Standardverfahren in der <a href=\"https:\/\/proof.proofen.de\/nl\/lexicon-2\/offset-drukwerk\/\" target=\"_self\" title=\"Offsetdrukken is een indirect drukproces. Indirect betekent dat de drukvorm en het substraat niet rechtstreeks met elkaar in contact komen, maar dat er een tussenliggend medium wordt gebruikt als middel voor de overdracht. Het is het meest gebruikte drukproces. Er zijn: - vellenoffsetpersen en - rotatieoffsetpersen.\" class=\"encyclopedia\">Offset afdrukken<\/a>industrie, bevor es durch Computer to Plate (<a href=\"https:\/\/proof.proofen.de\/nl\/lexicon-2\/ctp\/\" target=\"_self\" title='Het CTP-proces is het &quot;computer-to-plate&quot; proces waarbij de drukplaten rechtstreeks in een CTP-beeldbelichter worden geproduceerd zonder gebruik te maken van film. Het is sneller en nauwkeuriger, maar ook duurder dan het klassieke CTF-proces - &quot;computer-to-film&quot;.' class=\"encyclopedia\">CTP<\/a>) weitgehend verdr&auml;ngt wurde. Trotz der zunehmenden Digitalisierung in der Drucktechnik wird CTF immer noch in bestimmten Anwendungen und f&uuml;r spezielle Druckauftr&auml;ge eingesetzt.<\/p>\n<p>Beim CTF-Verfahren werden die digitalen Druckdaten von einem Computer direkt auf einen Film belichtet, der dann als Vorlage f&uuml;r die Herstellung der Druckplatten dient. Die Besonderheit des CTF-Verfahrens besteht darin, dass der Film als Medium f&uuml;r die Belichtung verwendet wird, was es von der direkten &Uuml;bertragung auf eine Druckplatte (CTP) unterscheidet. Normalerweise wird der Film mit Hilfe eines Lasers belichtet, wobei das Bild auf eine lichtempfindliche Schicht auf dem Film &uuml;bertragen wird.<\/p>\n<p>Der Vorteil von CTF lag in der hohen Aufl&ouml;sung und Detailgenauigkeit der Bild&uuml;bertragung. Insbesondere bei komplexen Layouts, feinen Details und Schattierungen konnte CTF eine hervorragende Bildqualit&auml;t liefern. Ein weiterer Vorteil des Verfahrens liegt in seiner Flexibilit&auml;t: Filmvorlagen k&ouml;nnen f&uuml;r eine Vielzahl von Druckverfahren und -formaten verwendet werden, ob Offset oder Siebdruck. W&auml;hrend CTF im Offset komplett verdr&auml;ngt wurde, ist es im Siebdruck weiter im Einsatz.<\/p>\n<p>Aufgrund des Zwischenschritts der Filmherstellung ist CTF jedoch in der Regel zeitaufw&auml;ndiger und teurer als CTP. Der Film muss hergestellt, entwickelt und dann f&uuml;r die Druckplattenherstellung weiterverarbeitet werden, was den gesamten Arbeitsablauf verlangsamt und zus&auml;tzliche Materialkosten verursacht. Diese Nachteile haben dazu gef&uuml;hrt, dass CTF zunehmend durch die direktere, effizientere und kosteng&uuml;nstigere CTP-Technologie ersetzt wird.<\/p>\n<p>Filme werden heute auch &ouml;fter &uuml;ber Plotter auf transparente Folien gedruckt. Diese haben zwar eine geringere Dichte und sind wesentlich h&ouml;her in der Abweichung von horizontaler und vertikaler Pr&auml;zision, aber eben deutlich g&uuml;nstiger und ohne jede Chemie und Belichtertechnik herzustellen.<\/p>\n<p>Ein sehr guter Dienstleister f&uuml;r klassische Filme ist Helmut K<a href=\"https:\/\/proof.proofen.de\/nl\/lexicon-2\/opp\/\" target=\"_self\" title='&quot;OPP&quot; staat voor &quot;Oriented Polypropylene&quot;, een soort plastic folie. OPP-folie is gemaakt van polypropyleen en wordt gekenmerkt door zijn ori\u00ebntatie. De ori\u00ebntatie van het materiaal wordt bereikt door een speciaal fabricageproces waarbij de folie wordt uitgerekt om de fysieke eigenschappen ervan te verbeteren. OPP-folies zijn transparant, glanzend en hebben een glad oppervlak. Ze bieden een hoge helderheid, zijn scheurvast, waterafstotend en hebben een goede barri\u00e8rewerking tegen vocht, oli\u00ebn en gassen. Deze eigenschappen maken OPP-folies veelzijdig en ze worden op verschillende gebieden gebruikt, vooral in de verpakkingsindustrie. Er zijn vier zogenaamde &quot;finishing proof&quot; standaarden van Fogra voor lamineren met OPP matte films en OPP glanzende films: Fogra49 en Fogra50 voor OPP papier op basis van film in de klassieke standaarden ISOCoatedV2 300%, en Fogra56 en Fogra57 voor OPP afwerking van PSOCoatedV3 afdrukken.' class=\"encyclopedia\">opp<\/a> met <a href=\"https:\/\/www.filmbelichtung24.de\/\">Filmbelichtung24.de<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Het CTF-proces is het \"computer-to-film\" proces waarbij de drukplaten niet rechtstreeks worden belicht, maar waarbij eerst een offsetfilm als tussenproduct wordt belicht, die vervolgens de uiteindelijke drukplaat 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