Photographic uses of polyvinylphenylmercapto-tetrazole:multivale

Details Photographic uses of polyvinylphenylmercapto-tetrazole:multivale Photographic uses of polyvinylphenylmercapto-tetrazole:multivale

1976-08-26

1978-07-25

Talbert, Jr., Dennis E.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 74, 96 76R, 96 77, 96114, G03C 140, G03C 176, G03C 148, G03C 172

Patent

active

041026853

ABSTRACT:
Diffusion transfer photographic products are disclosed which comprise a support carrying at least a photosensitive silver halide emulsion layer, a dye image-forming material and a layer comprising polymeric derivatives of tetrazole-5-thiols. Associated with this photographic product is a multivalent metal cation which diffuses to the layer comprising the polymeric derivatives of tetrazole-5-thiols to increase the permeability of said tetrazole-5-thiol containing layer to the dye image-forming material.

REFERENCES:
patent: 3748129 (1973-07-01), Autges et al.
patent: 3787209 (1974-01-01), Land
patent: 3936401 (1976-02-01), Grasshoff et al.

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