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The Kodak verifax, is a Photocopying using a wet colloidal diffusion transfer technique patented by Yutzy, H.C. and Yackel, E.C. (1947)〔 The light source is projected to the top crossing the negative being reflected -more or less, according to the color- against the original to be copied exposing the negative. Has a base that contains the recipient with the liquid developer and the exposure Timer. Due to its extreme simplicity was widespread until the late 60's, when it was surpassed by the popularity of the xerocopies using plain paper. Copies had some chemical smell and lost contrast over the time. == Diffusion transfer == The DT (Diffusion transfer) was widespread in several countries since 1960:〔(cool.conservation -us.org )〕 * CopyRapid Agfa; * Gevacopy of Gevaert (1950); * Verifax Kodak (1952-1976); * Copyproof (1980?); Other products not specifically intended for copying, but employing a similar PMT technology include: Kodak Ektaflex (1981); Polaroid, sepia (1948), id, White Black (1950), id, color (1963)... 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「Verifax copier」の詳細全文を読む スポンサード リンク
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