PHOTOGRAPHIC SILVER HALIDE EMULSIONS, PROCESS FOR PREPARING THE SAME AND THEIR USE IN COLOR REVERSAL FILMS

摘要

Photographic Silver Halide Emulsions, Process For Preparing The Same And Their Use In Color Reversal Films And Color Print Films Of Disclosure Photographic emulsions including high-iodide silver iodo-bromide grains dispersed in gelatin showed high-sensitivity characteristics when such grains have a composite structure including three iodo-bromide phases having different iodide contents. The contents vary from external levels of percent iodide lower than the nominal iodide content to internal percentages of iodide higher than the nominal content. Such emulsions are particularly good in obtaining a high-sensitivity color reversal film or included in the high sensitivity hemilayer of a color print negative film.