CONCENTRATED DEVELOPING COMPOSITION FOR BLACK- AND-WHITE SILVER HALIDE PHOTOGRAPHIC MATERIALS Russian patent published in 1997 - IPC

FIELD: photographic chemistry. SUBSTANCE: composition contains 0.026-0.900 mol/l of developing agent, 0.45-1.60 mol/l of developer antioxidant, 0.05-3.75 mol/l of accelerating agent, water (to 1 l), and, additionally, 0,1•10^-5-0.1 mol/l of C₃-C₁₂-alkylphenyl polyglycidyl ether with polymerization degree in polyglycidyl moiety from 1 to 13. Composition may also contain conventional additives such as restrainers and water softeners. Introduction of alkylphenyl polyglycidyl ether prolongs storage period of composition by 20-75% owing to lowered oxidation degree thereof by 30-80% and photographic activity drop by 20-75%. EFFECT: improved composition quality indexes. 2 tbl