SILVER HALIDE PHOTOGRAPHIC MATERIAL Russian patent published in 1997 - IPC

FIELD: photographic industry. SUBSTANCE: material consists of base, one of sides of which supports successively disposed (i) photosensitive layer made of gelatin AgBr/AgI emulsion containing 3,3'-di-γ-sulfopropyl-9-ethyl-5,5'- diphenyloxycarbocyaninebetaine pyridinium salt (spectral sensitizer) and 3,3'-[1",2"-bis(ethoxy)ethyl]-bis(1-ethylbenzimidazolium) diperchlorate or 3,3'-[1",2"-bis(ethoxy)ethyl]-bis(1-ethyl-2-methyl-5- chlorobezimidazolium) ditosylate (activator of spectral sensitizing) and (ii) gelatin antihalation counterlayer including antihalation dyes: condensation product of benzaldehydedisulfonic acid and hydroxythionnaphthenic acid; potassium salt of fuchsin sulfonation product; and 4-chloro-4-di(2-hydroxyethyl)amino-4"-(2- hydroxyethyl)ammonium chloride triphenylmethane. Material is supposed to be used in film duplicating and microfilming. EFFECT: improved chemical composition of material. 1 tbl