发明名称 |
Photographic process involving amplification with CO (III) complexes, silver-dye-bleaching and colorless dye formers which form bleachable dyes |
摘要 |
A process is disclosed for producing a positive colored image in an imagewise exposed photographic element. The element is comprised of a support having coated thereon at least one layer of a hydrophilic colloid coating containing at least one light-sensitive silver halide and, in association with said silver halide, a substantially colorless, image dye-providing compound. The image dye-providing compound is reactive with oxidized color-forming reducing agent to yield a bleachable image dye. The process is comprised of the following steps: A silver image is developed in the imagewise exposed areas of the photographic element and a low level silver fog is formed in the remaining areas of the element. Image dye-providing compound is then converted to a bleachable image dye uniformly throughout the photographic element using the silver as a catalyst for a redox reaction of a color-forming reducing agent and a cobalt(III) complex amplifier oxidizing agent. A silver-dye-bleach step is then performed which bleaches the uniformly generated dye in proportion to the amount of silver present. This produces a positive dye image. Finally, the photographic element is fixed.
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申请公布号 |
US4022616(A) |
申请公布日期 |
1977.05.10 |
申请号 |
US19760662306 |
申请日期 |
1976.03.01 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
BARR, CHARLES ROBERT;WILLIAMS, JOHN VINCENT |
分类号 |
G03C7/28;(IPC1-7):G03C7/16;G03C7/00;G03C5/38;G03C5/32 |
主分类号 |
G03C7/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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