METHOD OF PREPARING AMMONIACAL BROMO-SILVER PHOTOGRAPHIC EMULSION FOR COLOR PHOTOMATERIAL TO POURING Russian patent published in 1997 - IPC

FIELD: photomaterials. SUBSTANCE: the following compounds were added to the melt emulsion containing silver halide microcrystals (size - d = 0.7-1.0 mcm, pH = 7.0 ± 0.2; pBr = 2.2-2.4) exhibiting spherical microcrystal shape: 5-methyl-7-hydroxy-1,3,4-triazaindolicine, pyrocatechol, activator of the formula (I) , mixture of spectral sensitizing agent of the formula (II) where: R - , - J or absent, formula (III) where: A - H; 9,11-(β, β-dimethyl)-trimethylene, and formula (IV) , and purple components - 1-(3'-sulfo-4'-phenoxyphenyl)-3-stearoylaminopyrazolone-5. Additionally, before pouring and addition of activator of the formula (I) a mixture of 2-heptyl-5-methyl-7-hydroxytriazaindolicine and 5-phenyl-7-hydroxyazaindolicine is added at ratio 1:1 at amount of each component 0.02-0.04 g/1 l emulsion. EFFECT: improved method of emulsion preparing.