Process for the prevention of darkening and the formation of a s

Details Process for the prevention of darkening and the formation of a s Process for the prevention of darkening and the formation of a s

1979-03-26

1981-03-03

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Disparate function simultaneous process step

430456, 430488, G03C 530, G03C 538

Patent

active

042542154

ABSTRACT:
A process is described for the prevention of darkening and the formation of a sediment in photographic developer solutions which contain a silver halide developer, a water-soluble silver halide solvent and organic sulfur compounds. The organic sulfur compounds are a combination of (a) an organic thiol compound or thione compound capable of tautomerism and (b) a Bunte salt which contains groups conferring solubility in water. Developer solutions which contain the indicated combination of sulfur compounds are outstandingly stable.

REFERENCES:
patent: 3607904 (1971-09-01), Willems
patent: 3685991 (1972-08-01), Grasshoff et al.
patent: 3932480 (1976-01-01), Grasshoff et al.
patent: 4141734 (1979-02-01), Lenoir et al.

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