HALOGEN-SILVER PHOTOGRAPHIC MATERIAL AND METHOD OF IMAGE PREPARING ON IT Russian patent published in 1995 - IPC

FIELD: filming and copying processes. SUBSTANCE: photomaterial consists of the backing, halogen-silver photosensitive layer, protective gelatinous layer and stained gelatinous layer. The latter contains the dye - 3, 3,3′-diethyldiazolinocarbocyanine-p-toluenesulfonate or its mixture with bis-[1-(4′-sulfophenyl)-3-carboxypyrazolone-5-yl-4] -trimethinoxanine tetrapotassium salt and/or bis-[1-(4′-sulfophenyl)-3-carboxypyrazolone-5-yl-4]-pentaacetinoxanyl-tetrapotassium salt. Image preparing on the indicated material is performed by exposition and development in developing solvent. The latter has, g-mole/l: developing substance 0.01-0.45; preserving agent 0.2-1.0; accelerating agent sodium tetraborate 0.024-0.075; regulating agent of development boric acid 0.008-0.325, and water - up to 1 l. Degree of contrast coefficient range is increased by 4.5-5 times. EFFECT: enhanced quality of material. 5 cl, 2 tbl