Auxiliary developing agents, photographic materials incorporatin

Details Auxiliary developing agents, photographic materials incorporatin Auxiliary developing agents, photographic materials incorporatin

1997-11-14

1999-08-03

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430440, 430446, G03C 529

Patent

active

059323990

ABSTRACT:
A class of pyrazolidone compounds suitable for use as electron transfer agents in photographic development comprises pyrazolidones substituted in the 1-position by an aromatic group that is substituted in the ortho, meta or para position by -O-CO-R, wherein R is a monovalent organic group having up to 24 carbon atoms. This ester group is hydrolyzable in an alkaline developer solution, thereby deactivating the electron transfer agents after a period of time and reducing the contamination effect of seasoning into the developer solution. Photographic recording materials can be developed in reactive association with the electron transfer agent. The electron transfer agent can be present in the photographic recording materials, or in develper solutions.

REFERENCES:
patent: 2772282 (1956-11-01), Allen et al.
patent: 4155763 (1979-05-01), Hasebe et al.
patent: 4522917 (1985-06-01), Ichijima et al.
patent: 5017454 (1991-05-01), Nakamine et al.
patent: 5156940 (1992-10-01), Kok et al.
patent: 5618652 (1997-04-01), Ueda et al.

Affiliated with

Also associated with

Rating

Auxiliary developing agents, photographic materials incorporatin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Auxiliary developing agents, photographic materials incorporatin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auxiliary developing agents, photographic materials incorporatin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-848542