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Process camera : ウィキペディア英語版 | Process camera
A process camera is a specialised form of camera used for mass reproduction of graphic materials. The original document was photographed and the negatives (or positive films)produced were used to produce printing plates or other graphic media - usually via some kind of process where the negative was put in intimate contact with a printing plate in a vacuum frame(the printing plate having a U.V light-sensitive coating) and exposed to U.V. light. See offset lithography, silk screen printing, Photozincography and Heliozincography for more information on this process. Producing printing plates via photographic methods was pioneered by Ordnance Survey in around 1893. This process lasted around 100 years before digital technology made it become obsolete very quickly. 2 ==Vertical process camera==
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Process camera」の詳細全文を読む
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