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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Carbon print ： ウィキペディア英語版 Carbon print A carbon print is a photographic print with an image consisting of pigmented gelatin, rather than of silver or other metallic particles suspended in a uniform layer of gelatin, as in typical black-and-white prints, or of chromogenic dyes, as in typical photographic color prints. In the original version of the printing process, carbon tissue (a temporary support sheet coated with a layer of gelatin mixed with a pigment—originally carbon black, from which the name derives) is bathed in a potassium dichromate sensitizing solution, dried, then exposed to strong ultraviolet light through a photographic negative, hardening the gelatin in proportion to the amount of light reaching it. The tissue is then developed by treatment with warm water, which dissolves the unhardened gelatin. The resulting pigment image is physically transferred to a final support surface, either directly or indirectly. In an important early 20th century variation of the process, known as carbro printing, contact with a conventional silver bromide paper print, rather than exposure to light, was used to selectively harden the gelatin. A wide variety of colored pigments can be used instead of carbon black. The process can produce images of very high quality which are exceptionally resistant to fading and other deterioration. It was developed in the mid-19th century in response to concerns about the fading of early types of silver-based black-and-white prints, which was already becoming apparent within a relatively few years of their introduction. ==Carbon tissue== Carbon tissue is a gelatin-based emulsion used in the chemical etching(photoengraving) of gravure cylinders.〔(【引用サイトリンク】url=http://www.wmich.edu/pci/gravure/pp5.htm )〕 This was introduced by British physicist and chemist Joseph Swan〔(【引用サイトリンク】url=http://books.google.co.in/books?id=g4Wx9yKrDS0C&pg=PT314&lpg=PT314&dq=J.W.+Swan+carbon+tissue&source=bl&ots=QpxNtjUqsq&sig=DIytiYxt5p1lvie1GP02NopuKXY&hl=en&sa=X&ei=xrVBUuL0LsnZrQeu4oDACQ&ved=0CC8Q6AEwAQ#v=onepage&q=J.W.%20Swan%20carbon%20tissue&f=false )〕 in 1864.〔(【引用サイトリンク】url=http://www.photoeye.com/gallery/Definitions.cfm#Carbon )〕 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「Carbon print」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.