Photographic peracid bleaching composition and processing method

Details Photographic peracid bleaching composition and processing method Photographic peracid bleaching composition and processing method

1995-01-10

1996-05-28

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Bleaching

430393, 430461, 430943, G03C 742

Patent

active

055210562

ABSTRACT:
A photographic peracid bleaching composition contains a peracid bleaching agent, and a water-soluble ternary complex of ferric ion, a polycarboxylate ligand, and a second ligand which has at least one carboxyl group on an aromatic nitrogen heterocycle, such as a pyridinecarboxylic acid. These complexes act as catalysts for the peracid bleaching agent. Preferred complexes are biodegradable, but all of the ternary complexes can be used in a variety of peracid bleaching processes to good advantage.

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