发明名称 Silver halide color photographic materials
摘要 A silver halide color photographic material is provided, containing a pyrazoloazole type magenta coupler of the general formula (I): <IMAGE> (I) wherein R1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group which is removable by a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, =N- or -NH-; one of Za-Zb bond and Zb-Zc bond is a double bond and the other is a single bond; one of Za-Zb and Zb-Zc may optionally be condensed with a 5- to 7-membered ring when Za and Zb or Zb and Zc are both carbon atoms; R1 or X may form a dimer or higher polymer; when Za, Zb or Zc is a substituted methine group, said methine group may optionally form a dimer or higher polymer; characterized in that two or more monodispersed silver halide emulsions each having a different sensitivity are admixed and incorporated into the silver halide emulsion layer in said material, said monodispersed silver halide emulsion being regulated to have a ratio of sigma / &upbar& d of 0.2 or less, where sigma means a statistical standard deviation in the particle size distribution and &upbar& d means an average particle diameter. The present silver halide color photographic material may form a magenta image of good light absorption, and the gradation control thereof is easy. Thus, the present photographic material is characterized by improved color reproductivity and tone reproductivity.
申请公布号 US4830956(A) 申请公布日期 1989.05.16
申请号 US19880232520 申请日期 1988.08.15
申请人 FUJI PHOTO FILM CO., LTD. 发明人 WAKI, KOKICHI
分类号 G03C7/26;G03C1/005;G03C1/035;G03C7/30;G03C7/38 主分类号 G03C7/26
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