发明授权
- 专利标题: Corner development type silver halide photographic emulsions
- 专利标题(中): 角发展型卤化银照相乳剂
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申请号: US138405申请日: 1987-12-28
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公开(公告)号: US4820624A公开(公告)日: 1989-04-11
- 发明人: Kazunori Hasebe , Masahiro Asami , Naoto Ohshima , Keisuke Shiba , Toshihiro Nishikawa
- 申请人: Kazunori Hasebe , Masahiro Asami , Naoto Ohshima , Keisuke Shiba , Toshihiro Nishikawa
- 申请人地址: JPX Kanagawa
- 专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人地址: JPX Kanagawa
- 优先权: JPX61-311131 19861226; JPX62-86163 19870408
- 主分类号: G03C1/015
- IPC分类号: G03C1/015 ; G03C1/035 ; G03C1/07 ; G03C1/12 ; G03C5/29 ; G03C7/30 ; G03C1/02 ; G03C1/19
摘要:
A corner development type silver halide photographic emulsion is disclosed, wherein the silver halide crystals in the silver halide emulsion are cubic or tetradecahedral grains having at least substantial (100) planes and the emulsion is controlled so that at least 70% of developed silver halide crystals (grains), which are observed on applying a light exposure of 1/50 second to the emulsion under the light-exposure condition corresponding to (maximum density --minimum density).times.3/4 of the silver image in the characteristic curve of the emulsion obtained by the developer, developing under the development condition which are used for processing a photographic light-sensitive material formed by coating the emulsion on a support, and stopping the development with an aqueous solution of 5% glacial acetic acid just after the initiation of the development, are developed at the corners of the cubic or tetradecahedral crystals or at the vicinity of the corners.
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