Release of photographic reagents with 3-pyrazolidone developing

Details Release of photographic reagents with 3-pyrazolidone developing Release of photographic reagents with 3-pyrazolidone developing

1982-01-22

1984-03-06

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

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

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

430219, 430223, G03C 554

Patent

active

044354959

ABSTRACT:
Photographic reagents can be released, under alkaline conditions, from certain photographic reagent releasing compounds by means of oxidized 3-pyrazolidone developing agents. Particularly useful are acyclic and cyclic compounds in which the photographic reagent is linked, through a hetero atom, to a carbon atom which is adjacent to or in conjugation with a carbonyl group or an imino group. Upon reaction, under alkaline conditions, with an oxidized 3-pyrazolidone developing agent, the bond between the hetero atom and the carbon atom is cleaved. Photographic assemblages containing photographic reagent releasing compounds and processes of releasing photographic reagents in photographic elements and assemblages are described.

REFERENCES:
patent: 4195992 (1980-04-01), Stolzenburg et al.
patent: 4307175 (1981-12-01), Pollet et al.
patent: 4310612 (1982-01-01), Mooberry et al.

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