Processing of silver halide color photographic material

Details Processing of silver halide color photographic material Processing of silver halide color photographic material

1992-02-26

1993-08-10

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

Bleach-fix

430393, 430460, G03C 742

Patent

active

052348016

ABSTRACT:
A method for continuously processing an image-wise exposed silver halide color photographic material comprising the steps of color developing, bleach-fixing and at least one of washing with water and stabilizing. A replenisher is supplied to the bleach-fix bath to result in an overflow of from 30 to 500 ml/m.sup.2 of the photographic material processed. The bleach-fixing step further comprises collecting the bleach-fix overflow, regenerating the collected bleach-fix bath overflow by adding thereto a regenerant to produce a regenerated bleach-fix bath, and reusing the regenerated bleach-fix bath as a replenisher to the bleach-fix bath. The regeneration rate defined as the amount of bleach-fix overflow used for regeneration divided by the total amount of overflow multiplied by 100% is more than 80%. The photographic layers of the silver halide color photographic material have a degree of swelling of from about 2.5 to 4.0. The silver halide color photographic material further has a silver coverage of less than about 0.8 g/m.sup.2. The above described method solves problems of poor desilvering, inadequate color reproduction and undesirable cyan thermal discoloration which generally accompany reuse of the bleach-fixing bath.

REFERENCES:
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Chelates of Polyaminocarboxylic Acids, Joan Bond and T. I. Jones, pp. 1310-1318, Chemistry Dept., Royal Technical College, Peel Park, Salford 5, Jan. 1959.
RD 10150 "Method for preparing bleach-fix regenerator calculate", Sep. 1972, pp. 76-77.

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