Silver halide color photographic materials

Details Silver halide color photographic materials Silver halide color photographic materials

1988-08-15

1989-05-16

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430567, 430571, G03C 738

Patent

active

048309567

ABSTRACT:
A silver halide color photographic material is provided, containing a pyrazoloazole type magenta coupler of the general formula (I): ##STR1## wherein R.sup.1 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, .dbd.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; R.sup.1 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./d of 0.2 or less, where .sigma. means a statistical standard deviation in the particle size distribution and 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.

REFERENCES:
patent: 4547458 (1985-10-01), Iijima et al.
patent: 4618573 (1986-10-01), Okamura et al.
patent: 4622287 (1986-11-01), Umemoto et al.

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