Weakly alkaline ascorbic acid developing composition, processing

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

1997-12-17

1998-12-29

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430446, 430492, G03C 529

Patent

active

058539646

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: 4840888 (1989-06-01), Kawasaki et al.
patent: 4868098 (1989-09-01), Steiger et al.
patent: 5589323 (1996-12-01), Adkins et al.

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-1423092