Photographic bleaching solution and use thereof in...

Details Photographic bleaching solution and use thereof in... Photographic bleaching solution and use thereof in...

G - Physics

03

C

G03C 7/42 (2006.01)

Patent

CA 2073765

2073765 9111753 PCTABS00006 An environmentally advantageous photographic bleaching solution for use in the color processing of photographic elements comprises (1) as a bleaching agent, a potassium salt of a ferric complex of an aminopolycarboxylic acid, (2) as an agent which functions to convert silver to silver halide, a potassium halide, and (3) as an agent which functions to inhibit bleach induced dye formation, a water-soluble aliphatic carboxylic acid. The bleaching solution is especially useful in the processing of photographic elements containing a low pKa, high-activity, yellow-dye-forming coupler in that it serves to effectively avoid the undesirable increase in blue Dmin that can occur in such elements as a result of bleach induced dye formation.

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