Blocked photographically useful compounds and photographic compo

Details Blocked photographically useful compounds and photographic compo Blocked photographically useful compounds and photographic compo

1981-08-12

1982-11-09

Schilling, Richard C.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430212, 430218, 430219, 430222, 430223, 430543, 430544, 430559, 430562, 430564, 430566, 430570, 430598, 430955, 430957, 430959, 430960, G03C 140, G03C 148, G03C 554, G03C 110

Patent

active

043585256

ABSTRACT:
Photographically useful compounds such as photographic reagents and photographic dyes are blocked with a grouping which, under alkaline conditions, is cleaved from the compound by an intramolecular nucleophilic displacement reaction. The compounds are resistant to unblocking under storage conditions, but are uniformly unblocked under conditions encountered during photographic processing.

REFERENCES:
patent: 3980479 (1976-09-01), Fields
patent: 4199354 (1980-04-01), Hinshaw et al.
patent: 4310612 (1982-01-01), Mooberry et al.

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