Dye bleach preparation for the photographic silver dye bleach pr

Details Dye bleach preparation for the photographic silver dye bleach pr Dye bleach preparation for the photographic silver dye bleach pr

1974-05-10

1976-06-08

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

With means for vapor or liquid contact

96 20, 96 60R, G03C 700

Patent

active

039619575

ABSTRACT:
The invention relates to a dye bleach preparation which contains in addition to an acid, a water-soluble iodide and optionally a dye bleach catalyst at least one bifunctional sulphur compound having a sufficient solubility in the preparation and a low vapor pressure and containing at least one HS-group and at least one oxygen, nitrogen, phosphorus or additional sulphur atom, the sulphur atom of each HS-group being separated from the next oxygen, sulphur, nitrogen and phosphorus atom present in the molecule by at least three carbon atoms.

REFERENCES:
patent: 2270118 (1942-01-01), Gaspar
patent: 2564238 (1951-07-01), Sprung
patent: 3620744 (1971-11-01), Schellenberg et al.
patent: 3772020 (1973-11-01), Smith
patent: 3868253 (1975-02-01), Marthaler et al.
Newman, "The Chemistry of Stabilization Processing", British Journal of Photography, vol. 114, No. 5601, pp. 1009-1012, 1967.

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