发明授权
- 专利标题: Direct positive-type silver halide light-sensitive photographic material
- 专利标题(中): 直接正型卤化银感光感光材料
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申请号: US247172申请日: 1988-09-21
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公开(公告)号: US4939078A公开(公告)日: 1990-07-03
- 发明人: Kazuya Kuramoto , Bunzo Ueda , Yasuo Tosaka
- 申请人: Kazuya Kuramoto , Bunzo Ueda , Yasuo Tosaka
- 申请人地址: JPX Tokyo
- 专利权人: Konica Corporation
- 当前专利权人: Konica Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX62-238229 19870922; JPX62-250258 19871003
- 主分类号: G03C7/30
- IPC分类号: G03C7/30
摘要:
A direct positive type silver halide photographic material and developing method therefor are disclosed. The photographic material have blue-, green- and red-sensitive emulsion layers and each of these emulsion layer contains at least two kinds of silver halide emulsion being different from each other in average grain size. The average grain diameter S of the emulsion having the smallest average grain size and the average grain diameter of the emulsion having the largest average grain size in each emulsion layer have a proportional relation of 1.6.ltoreq.L/S. The emulsion having the smallest average grain size is contained in a ratio of from 2 to 50% in the blue-sensitive layer and 2 to 40% in green- and red-sensitive emulsion layer.
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