SILVER HALIDE PHOTOGRAPHIC EMULSION, ITS MANUFACTURE, METHOD FOR PROCESSING SILVER HALIDE PHOTOGRAPHIC SENSITIVE MATERIAL AND MEDICAL ONE

摘要

PURPOSE: To enhance sensitivity and storage stability against time lapse and the like by incorporating specified-polyhedral monodispersed core-shell-type roundish silver halide grains having plural twin faces parallel to each other and specified in an average iodine content. ;CONSTITUTION: The monodispersed core-shell type silver halide grains to be added have an average iodine content of 3mol% of the total silver halides, 2 twin faces parallel to each other, and substantially roundish hexahedral or tetradecahedral forms. Preferable silver halide is silver bromide, silver iodobromide, and silver chloroiodobromide and the content of the silver halide grains having the 2 parallel twin faces is, preferably, ≥50 number %, especially, ≥70 number %, and it is preferred that the monodispersed silver halide emulsion contains the silver halide grains in an amount of ≥60 weight %, especially, ≥80 weight % of the total silver halide grains in the grain diameter range of ±20% as the center of the average grain diameter.;COPYRIGHT: (C)1995,JPO