PHOTOGRAPHIC HALOGEN-SILVER SUBSTANCE Russian patent published in 1999 - IPC

FIELD: photographic chemistry. SUBSTANCE: halogen-silver substance consists of backing, adhesion gelatin sublayer, emulsion halogen-silver layer made as bromoiodosilver emulsion (silver halide microcrystal size d = 0.4-0.7 μm², content is 3.0-7.5 mol.%) and containing activators of spectral sensitization and spectral sensitizing agents taken from compounds of the general formula (I) where A - H, lower alkoxyl-group; A¹ - H; A² - H, lower alkyl, or A¹ and A² form together (CH₂C(CH₃)₂CH₂-,CH₂CH(CH₃)CH₂-; R - lower alkyl, (CH₂)₃SO-3

; B - H, 5,5'-di--OCH₃, 6,6'-di-SCH₃; m, n = 0, 1; X^- is , and/or of the formula (II) -CH₃O where A - lower alkyl; B - 4,5-benzo-, 5-; Z - 5,6-dimethylthio-[2,3-d]-thiazoline-2- -ylidene, 5-methoxybenzthiazole, 4,5-benzobenzthiazole; R - lower alkyl; K - 1,1-diethyl-2,2-quinocyanine, 3,3-diethyl-thiazolinocarbocyanine, and color component - 1-(4-phenoxy- -3-sulfophenyl)-3-stearylaminopyrazolone-5 (III) or a mixture of (III) and 3,5-di-(2-methyl-5-octadecenylsuccinoylamino-benzoylsulfamino)-1,2-xylene (IV) at ratio (III) : (IV) = (2: 1)-(3: 1). A conterlayer is applied on backing backsite that has antioral dyes. The use of the above indicated bromoiodosilver emulsion, activators of spectral sensitization, spectral sensitizing agents of the formula (I) and (II) and antioral dyes as components halogen-silver emulsion layer ensures to obtain photographic substance exhibiting broad zone of sensitization from 400 to 860 nm, high resolution capacity at retained level of light-sensitivity, uniform distribution of degree of contrast in sensitization zone. Silver pump up is decreased from 9.0 to 5.0-7.0 g/m². Invention can be used in different branches of science and practice. EFFECT: improved quality and properties of photomaterial. 4 cl, 2 tbl, 27 ex