Bleaching solution for processing a silver halide color photogra

Details Bleaching solution for processing a silver halide color photogra Bleaching solution for processing a silver halide color photogra

1992-02-26

1993-09-21

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430430, 430461, G03C 742

Patent

active

052468216

ABSTRACT:
A photographic bleaching solution for procesisng a silver halide color photographic material, comprising an iron(III) complex salt of an organic acid in a concentration of from 0.01 mol/l to less than 0.1 mol/l, at least 50 mol % of said iron(III) complex salt of an organic acid contained in the bleaching solution is an iron(III) complex salt of an organic acid having an oxidation-reduction potential of not lower than 200 mV determined by using a normal hydrogen electrode at pH 5.0 (excluding iron(III) complex salts of iminodiacetic acid and iron(III) complex salts of methyliminodiacetic acid), and an acid having a pKa of from 2 to 5.5 (excluding aminopolycarboxylic acids, salts thereof and iron complex salts of the aminopolycarboxylic acids) in a concentration of from 0.1 mol/l to 0.8 mol/l, and the concentration of ammonium ion in the bleaching solution is not higher than 0.3 mol/l. A method for processing a silver halide color photographic material using said bleaching solution.

REFERENCES:
patent: 4524129 (1985-06-01), Kishimoto et al.
patent: 4910125 (1990-03-01), Haruuchi et al.
patent: 5061608 (1991-10-01), Foster et al.
patent: 5068170 (1991-11-01), Abe
World Patents Index Latest, Section PQ, Week 9101 Derwent Publications Ltd., London, GB; Class P83, AN 91-004594 & JP-A-2 282 740 (Fuji Photo Film Co., Ltd.) 20 Nov. 1990.

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