Positive-working immobile photographic compounds and photographi

Details Positive-working immobile photographic compounds and photographi Positive-working immobile photographic compounds and photographi

1975-06-24

1980-04-22

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

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

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

430959, 430566, 430542, 430599, 430362, 430955, 430202, 430212, 430219, 430234, 430242, 430544, 430566, 430607, 430621, G03C 554, G03C 140, G03C 176, G03C 110

Patent

active

041993551

ABSTRACT:
Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to improved immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photographically useful group.

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patent: 3728113 (1973-04-01), Becker et al.
patent: 3854945 (1974-12-01), Bush et al.
patent: 3880658 (1975-04-01), Lestina et al.

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