发明授权
- 专利标题: Method for increasing the contrast of photographic silver images
- 专利标题(中): 增加摄影银图像对比度的方法
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申请号: US808644申请日: 1991-12-17
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公开(公告)号: US5266442A公开(公告)日: 1993-11-30
- 发明人: Richard A. Ooms
- 申请人: Richard A. Ooms
- 申请人地址: BEX Mortsel
- 专利权人: Agfa-Gevaert N.V.
- 当前专利权人: Agfa-Gevaert N.V.
- 当前专利权人地址: BEX Mortsel
- 优先权: EPX91200064 19910115
- 主分类号: G03C1/015
- IPC分类号: G03C1/015 ; G03C1/06 ; G03C1/09 ; G03C5/08 ; G03C5/29
摘要:
A method for the production of a silver image with improved contrast by the development of an image-wise exposed photographic silver halide emulsion layer material with a developer liquid containing a hydroquinone in the presence of an auxiliary developing agent, wherein said developer liquid is applied to said photographic material containing silver halide grains that have been chemically sensitized with organic thiosulphonic acid anions in combination with a gold sensitizer in the absence of thiosulphate ions.
公开/授权文献
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