Naphthoquinone redox dye-releasers

Details Naphthoquinone redox dye-releasers Naphthoquinone redox dye-releasers

1985-05-13

1986-01-14

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...

430559, 430562, G03C 140, G03C 554

Patent

active

045645779

ABSTRACT:
Photographic elements and diffusion transfer assemblages are described which employ a nondiffusible, positive-working, redox dye-releaser having the formula: ##STR1## wherein: (a) R.sup.1 represents a substituted or unsubstituted alkyl group of from 1 to about 30 carbon atoms or a substituted or unsubstituted aryl group of from 6 to about 12 carbon atoms,

REFERENCES:
patent: 4139379 (1979-02-01), Chasman et al.
patent: 4232107 (1980-11-01), Janssens

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