Weakly alkaline ascorbic acid developing composition, processing

Details Weakly alkaline ascorbic acid developing composition, processing Weakly alkaline ascorbic acid developing composition, processing

1996-06-28

1997-12-30

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430440, 430446, 430465, 430480, 430483, G03C 530

Patent

active

057028753

ABSTRACT:
A black-and-white developing composition includes as ascorbic acid developing agent, an auxiliary super-additive developing agent, borate buffer and a preservative. The composition pH is from 7 but less than 9. The composition can be formulated from two separately packaged parts that may be in dry or liquid form. The borate buffer is present to maintain the desired pH, and the two developing agents are present in desired molar ratios for optimal developing activity. Improved photographic properties are obtained while avoiding the use of environmentally unfriendly dihydroxybenzenes.

REFERENCES:
patent: 2688549 (1954-09-01), James et al.
patent: 3453109 (1969-07-01), Lee
patent: 3826654 (1974-07-01), Weiss et al.
patent: 3865591 (1975-02-01), Katz
patent: 3942985 (1976-03-01), Newman et al.
patent: 4840888 (1989-06-01), Kawasaki et al.
patent: 4868098 (1989-09-01), Steiger 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), Parket et al.
patent: 5384232 (1995-01-01), Bishop et al.
patent: 5474879 (1995-12-01), Fittermann et al.
patent: 5498511 (1996-03-01), Yamashita et al.
patent: 5503965 (1996-04-01), Okutsu
patent: 5589323 (1996-12-01), Adkins et al.
Research Disclosure, pub. 37152, Mar., 1995.

Affiliated with

Also associated with

Rating

Weakly alkaline ascorbic acid developing composition, processing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Weakly alkaline ascorbic acid developing composition, processing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weakly alkaline ascorbic acid developing composition, processing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-201151