Diffusion transfer film unit with pH sensitive filter backing la

Details Diffusion transfer film unit with pH sensitive filter backing la Diffusion transfer film unit with pH sensitive filter backing la

1984-06-25

1987-03-31

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...

430212, G03C 700, G03C 554

Patent

active

046542930

ABSTRACT:
The present invention is directed to a color diffusion transfer film unit comprising a transparent support carrying on a first side at least a first photosensitive silver halide emulsion layer having dye image-providing material associated therewith, a substantially opaque layer, a reflective layer and a dye image-receiving layer; said transparent support carrying on a second side a layer initially transparent to radiation actinic to said silver halide emulsion, said initially transparent layer adapted to convert an opaque layer upon contact with alkali which prevents transmission of exposing radiation to said silver halide emulsion layer wherein said photosensitive silver halide emulsion layer is intermediate said initially transparent layer and said opaque layer.

REFERENCES:
patent: 3647437 (1972-03-01), Land
patent: 4407929 (1983-10-01), Boie et al.

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