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    • 1. 发明授权
    • Process for producing positive color diffusion transfer images using
redox dye releasers
    • 使用氧化还原染料释放剂产生正色扩散转印图像的方法
    • US3998637A
    • 1976-12-21
    • US601067
    • 1975-08-01
    • William Henry FaulHarry David Franchino
    • William Henry FaulHarry David Franchino
    • G03C8/10G03C7/00G03C5/54G03C7/16
    • G03C8/10
    • Positive color diffusion transfer images are produced by a process that employs light-sensitive photographic elements containing dye-releasing redox agents. The dye-releasing redox agents may be a sulfonamido compound or a hydroquinone derivative which are capable of cleaving to release a diffusible color-providing moiety. A preferred process involves the use of black-and-white developer compositions and comprises1. developing only a negative silver image in the imagewise exposed areas of the photographic element;2. fogging the residual silver halide;3. developing the residual silver halide in the fogged element to silver and concurrently releasing a diffusible dye or dye precurser in the non-image, fogged silver halide areas; and4. at least a portion of the diffusible dye or dye precurser compound diffusing to a dye image-receiving layer.
    • 通过使用含有染料释放氧化还原剂的感光照相元件的方法产生正色扩散转印图像。 染料释放的氧化还原剂可以是能够裂解以释放可扩散的提供色彩的部分的亚磺酰氨基化合物或氢醌衍生物。 优选的方法包括使用黑白显影剂组合物,并且包括:仅在照相元件的图像曝光区域中仅开发阴影图像; 2.停留残留银; 3.将灭火元素中的残留银制成银,并在非图像的银白炽地区中同时释放出一种不可或缺的染料或染色体前体; 和4.至少将可分散的染色体或染色体前体化合物的部分扩散到染色图像接收层。