SILVER HALIDE EMULSION, PRODUCTION OF SILVER HALIDE EMULSION, SILVER HALIDE COLOR PHOTOGRAPHIC SENSITIVE MATERIAL, AND IMAGE FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a silver halide emulsion which is excellent in a reciprocity law characteristic at high illuminance in a short time, small in sensitivity fluctuation by the time fluctuation to post-exposure processing, and low in sensitivity degradation when exposed under a high humidity, and a silver halide color photographic sensitive material and an image forming method using the same. ;SOLUTION: This silver halide emulsion has a silver bromide-rich phase contg. an iridium compd. near the particle surfaces of the silver halide particles in the silver chlorobromide or silver chloroiodobromide emulsion having a silver chloride content of ≥90 mol.% and has a region where the iridium compd. density is higher than in the outer part of this rich phase in the inner part of the silver bromide-rich phase. This silver halide color photographic sensitive material contains this emulsion. The silver halide color photographic sensitive material is subjected to development processing after exposure. The silver halide emulsion described above is formed by ≥2 steps of stages changing the amt. of the iridium compd. to be added.;COPYRIGHT: (C)1999,JPO