Diffusion transfer process

Details Diffusion transfer process Diffusion transfer process

1981-04-17

1982-08-17

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...

430249, 430438, 430517, 430566, G03C 554

Patent

active

043450199

ABSTRACT:
Transfer silver images high in maximum density, contrast and sharpness and small in dependency on developing temperatures are obtained by image wise exposing and developing a diffusion transfer light sensitive material which comprises a support having thereon at least a carbon black-containing layer and a silver halide emulsion layer present on said carbon black containing layer, said carbon black-containing layer and/or layer adjacent thereto containing 3-pyrazolidone compound represented by the following general formula: ##STR1## wherein R.sub.1 and R.sub.2 are hydroxyalkyl or alkyl group of 1-4 carbon atoms, at least one of R.sub.1 and R.sub.2 being hydroxyalkyl group and R.sub.3 is an aryl group.

REFERENCES:
patent: 4186004 (1980-01-01), Deabriges et al.
patent: 4199354 (1980-04-01), Hinshaw et al.
patent: 4199362 (1980-04-01), Yoshida et al.
patent: 4287291 (1981-09-01), Onodera

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