SILVER HALIDE EMULSION, SILVER HALIDE PHOTOGRAPHIC SENSITIVE MATERIAL, SILVER HALIDE COLOR PHOTOGRAPHIC SENSITIVE MATERIAL AND HEAT DEVELOPABLE SILVER HALIDE PHOTOGRAPHIC SENSITIVE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a silver halide emulsion spectrally sensitized by incorporating a specified compound (sensitizing dye) and having improved photographic characteristics such as sensitivity, fog, shelf stability and residual color and to provide a silver halide photographic sensitive material, a silver halide color photographic sensitive material and a heat developable silver salt photographic sensitive material. SOLUTION: The silver halide emulsion contains at least one compound of formula 1 or 2.