Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1999-06-24
2000-07-11
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
218487, G03C 1295
Patent
active
060870842
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: 5017954 (1991-05-01), Nakamine et al.
patent: 5156940 (1992-10-01), Kok et al.
patent: 5618652 (1997-04-01), Ueda et al.
Tsoi Siu C.
Twist Peter J.
Eastman Kodak Company
Le Hoa Van
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