Process for development of black-and-white- silver halide photog

Details Process for development of black-and-white- silver halide photog Process for development of black-and-white- silver halide photog

1994-09-27

1996-04-02

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

Developer

430435, 430440, 430483, 430488, 430489, 430490, G03C 518, G03C 526

Patent

active

055039650

ABSTRACT:
The present invention improves the running stability of a developer comprising an ascorbic acid instead of hydroquinone as a developing agent. The present invention provides a process for development of a black-and-white silver halide photographic material, which comprises use of a development replenisher for black-and-white silver halide photographic material comprising an ascorbic acid and/or derivative thereof which has a pH value of at least 0.5 higher than that of the development starting solution.

REFERENCES:
patent: 2688548 (1954-09-01), Reynolds
patent: 2688549 (1954-09-01), James et al.
patent: 3022168 (1962-02-01), Stjarnkvist
patent: 3337342 (1967-08-01), Green
patent: 3600176 (1971-08-01), Haist et al.
patent: 3658527 (1972-04-01), Kunz et al.
patent: 3870479 (1975-03-01), Kubotera et al.
patent: 4310622 (1982-01-01), Onda et al.
patent: 4668605 (1987-05-01), Okutsu et al.
patent: 5098819 (1992-03-01), Knapp
patent: 5196298 (1993-03-01), Meeus et al.
patent: 5236816 (1993-08-01), Purol et al.
patent: 5264323 (1993-11-01), Purol et al.
patent: 5278035 (1994-01-01), Knapp
patent: 5376510 (1994-12-01), Parker et al.
patent: 5385811 (1995-01-01), Hirano
T. H. James and W. Vanselow, "The Kinetics of Development by 1-Phenyl-3-Pyrazolidone", PSA Technical Quarterly, Aug. 1954, pp. 77-80.

Affiliated with

Also associated with

Rating

Process for development of black-and-white- silver halide photog does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for development of black-and-white- silver halide photog, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for development of black-and-white- silver halide photog will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2015527