Silver salt diffusion transfer image-forming process

Details Silver salt diffusion transfer image-forming process Silver salt diffusion transfer image-forming process

1992-05-20

1993-04-27

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...

430233, 430248, 430249, 430965, G03C 554

Patent

active

052061159

ABSTRACT:
A film unit for use in a silver salt diffusion transfer image-forming process is disclosed. The film unit includes a light-sensitive element, an alkaline treating element, and an image-receiving element. The light-sensitive element includes a light-sensitive silver halide emulsion layer containing a light-sensitive silver halide emulsion which contains silver bromoiodide or silver bromoiodochloride having a silver iodide content of 0.5 to 3.5 mol %, wherein silver bromoiodide having a silver iodide content of 1 to 5 mol % is formed on the surface of the silver halide grains in an amount of from 3 to 10% on a silver basis after completion of chemical sensitization. The alkaline treating element contains a water-soluble iodide in an amount of from 0.3 to 3.0 mM/l and tetrahydrophyrimidinethione in an amount of from 0.3 to 3.0 mM/l. The film unit allows rapid completion of transfer images without loss of photographing sensitivity. Pitch-black images can be obtained rapidly without the need for image stabilizing treatments. A silver salt diffusion transfer image-forming process employing the film unit is also disclosed.

REFERENCES:
patent: 3236642 (1966-02-01), Rintelen et al.
patent: 4436805 (1984-03-01), Iguchi et al.
patent: 4734354 (1988-03-01), Takagi

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