Silver salt diffusion transfer reversal process

Details Silver salt diffusion transfer reversal process Silver salt diffusion transfer reversal process

1986-10-09

1988-01-19

Welsh, J. David

Radiation imagery chemistry: process, composition, or product th

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

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

G03C 554

Patent

active

047204478

ABSTRACT:
Method of making images by image-wise exposing a silver halide emulsion layer, developing it with an alkaline processing solution in the presence of a silver halide solvent and causing silver complexes to diffuse from the emulsion layer into a non-light-sensitive image-receiving layer in the presence of development nuclei thereby to form a silver transfer image in that layer, said transfer image formation occurring in the presence of at least one heterocyclic azole compound, which influences the density and tone of said transfer image, said compound being contained in said image-receiving layer and/or in said processing solution and being a heterocyclic azole corresponding to the general formula: ##STR1## wherein Y is .dbd.N-- or .dbd.HC--; Z represents atoms completing a heterocycle; A is a chemical bond or the group --(L.sup.1).sub.n --Alk--(L.sup.2).sub.m -- wherein n is 0 or 1, L.sup.1 is --S--, Alk is alkylene, which can be substituted and/or interrupted by hetero atom(s) or group(s) containing a hetero atom, arylene, or alkenylene; m is 0 or 1, L.sup.2 is --S--, --Se--, or --N(R.sup.2)--, wherein R.sup.2 is H or alkyl; X is alkyl, alkenyl, aryl, or heterocyclyl, which can be substituted; and wherein water-solubilizing group(s) can be present in said azole. The invention also provides an image-receiving layer and/or a processing solution incorporating such azole.

REFERENCES:
patent: 4309499 (1982-01-01), Takagi et al.

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