Additive color silver salt transfer film unit with layer of chitin and cupric salt
AssigneePolaroid Corporation
InventorKenneth G. Scott
Life of this patent
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Abstract
This invention is directed to an additive color diffusion transfer film unit which comprises, in order, an additive multicolor screen, a silver precipitating layer, a layer of chitin having a copper salt disposed therein, and a photosensitive silver halide layer.
Claims23
An additive color diffusion transfer film unit which comprises a transparent support carrying, in order, an additive color screen, a layer comprising silver precipitating nuclei, a layer comprising a water soluble cupric salt and a compound selected from the group consisting of deacetylated chitin and 2-amino-2deoxyglucose and a photosensitive silver halide emulsion layer.
A photographic process which comprises the steps of:
- a. exposing a film unit which comprises, in order, a transparent support, an additive color screen, a layer comprising silver precipitating nuclei, a layer comprising a water soluble cupric salt and a compound selected from the group consisting of deacetylated chitin and 2-amino-2-deoxyglucose, and a photosensitive silver halide emulsion layer;
- and
- b. contacting said exposed film unit with a processing composition containing a silver halide developing agent and a silver halide solvent adapted to provide a positive silver image in said layer comprising silver precipitating nuclei.
An additive color diffusion transfer film unit which comprises a transparent support carrying, in order, a trichromatic additive color screen comprising red, green and blue filter elements;
- a layer of palladium metal silver precipitating nuclei;
- a layer comprising deacetylated chitin and water soluble cupric salt;
- a photosensitive silver halide emulsion layer and an antihalation layer containing processing composition dischargable dyes therein.
Dependencies are inferred from the claim text.