发明授权
US06261756B1 Light-sensitive silver halide color photographic elements containing 2-equivalent 5-pyrazolone magenta coupler and colored magenta coupler
失效
含有2-当量5-吡唑啉酮品红色偶合剂和着色品红色成色剂的感光卤化银彩色照相元件
- 专利标题： Light-sensitive silver halide color photographic elements containing 2-equivalent 5-pyrazolone magenta coupler and colored magenta coupler
- 专利标题（中）： 含有2-当量5-吡唑啉酮品红色偶合剂和着色品红色成色剂的感光卤化银彩色照相元件
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申请号： US09576529申请日： 2000-05-23
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公开(公告)号： US06261756B1公开(公告)日： 2001-07-17
- 发明人: Raffaella Biavasco , Emilio Prosperi , Roberto Sardelli
- 申请人： Raffaella Biavasco , Emilio Prosperi , Roberto Sardelli
- 优先权： EP99110140 19990525
- 主分类号： G03C108
- IPC分类号： G03C108
摘要：
The present invention refers to a light-sensitive silver halide multilayer color photographic element having a support base and coated thereon blue-, green- and red-sensitive silver halide emulsion layers respectively associated with non-diffusing yellow, magenta and cyan dye-forming couplers, wherein at least one green-sensitive layer contains a 2-equivalent 3-anilino-4-phenylthio-5-pyrazolone magenta coupler and a 4-(4-hydroxy-phenylazo)-5-pyrazolone colored magenta coupler. The multilayer color photographic element of the present invention presents an improved speed and contrast, without a detrimental effect on the other sensitometric properties, such as Dmin and Dmax.