Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Disparate function simultaneous process step
Patent
1996-11-12
1998-07-07
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Disparate function simultaneous process step
430393, 430427, 430430, 430461, 430943, G03C 742
Patent
active
057766657
ABSTRACT:
Certain organic carbocyclic and heterocyclic compounds are useful catalysts for hydrogen peroxide bleaching agents in photographic processing methods. These compounds are oxidizable by hydrogen peroxide and reducible by silver metal at a pH of from 1 to 7, and have a chemically reversible redox couple of from about -0.20 to about +1.0 volts at the same pH. The hydrogen peroxide bleaching ability is enhanced by the presence of these compounds which can be used in the bleaching solution itself, or in a prebath solution. The combination of the organic compound with a transition metal ion co-catalyst provides a synergistic effect in bleaching acceleration.
REFERENCES:
patent: 4045225 (1977-08-01), Shimamura et al.
patent: 5188927 (1993-02-01), Okada et al.
patent: 5217855 (1993-06-01), Okada et al.
patent: 5223379 (1993-06-01), Okada et al.
patent: 5236714 (1993-08-01), Kuse et al.
patent: 5250401 (1993-10-01), Okada et al.
patent: 5250402 (1993-10-01), Okada et al.
patent: 5316898 (1994-05-01), Ueda et al.
patent: 5338649 (1994-08-01), Inaba et al.
patent: 5409804 (1995-04-01), Inaba et al.
patent: 5510232 (1996-04-01), O'Toole
Eastman Kodak Company
Le Hoa Van
Tucker J. Lanny
LandOfFree
Photographic processing composition and method using organic cat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photographic processing composition and method using organic cat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic processing composition and method using organic cat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1203925