Processing of photographic silver halide photosensitive material

Details Processing of photographic silver halide photosensitive material Processing of photographic silver halide photosensitive material

1993-02-25

1994-03-29

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

430363, 430453, 430458, 430642, 430963, G03C 173

Patent

active

052983820

ABSTRACT:
Photographic silver halide photosensitive material is processed, after exposure, by treating it with a working fixer solution. The photosensitive material comprises at least one layer of silver halide emulsion on a support and contains at least 10% by weight, based on gelatins, of a gelatin having an isoelectric point of at least 5.0 on the emulsion layer side. The working fixer solution is prepared by furnishing a fixer concentrate of at least pH 5 containing a thiosulfate as a fixing agent, 0.05-0.8 mol/liter of a sulfite and up to 0.01 mol/liter of a water-soluble aluminum salt, and diluting the fixer concentrate with water, thereby forming the working fixer solution containing a minimized amount of ammonium thiosulfate and 0.5-2.5 mol/liter of sodium thiosulfate. The method provides improved rapid processing with increased degrees of fixation and drying while preventing the generation of sulfurous acid and ammonia gases.

REFERENCES:
patent: 2195405 (1940-04-01), Brubaker
patent: 4266010 (1981-05-01), Nagatomo et al.
patent: 4444873 (1984-04-01), Ishikawa et al.
patent: 5116722 (1992-05-01), Callant et al.
patent: 5206120 (1993-04-01), Hayashi

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