Process of making a lithographic photosensitive silver halide emulsion having reduced susceptibility to pressure containing an iridium compound, a hydroxytetrazaindene and a polyoxyethylene

摘要

A method of producing a lithographic photosensitive material comprising adding a water soluble iridium compound to the photographic emulsion in a ratio of about 10-6 to 10-4 mole per mole of the silver halide at the first or second ripening procedure of a silver halide photographic emulsion containing at least 60 mole% silver chloride, further adding a hydroxytetrazaindene compound and a polyoxyethylene compound to the photographic emulsion and coating the photographic emulsion on a support.