Color diffusion transfer photographic materials with vinyl copol

Details Color diffusion transfer photographic materials with vinyl copol Color diffusion transfer photographic materials with vinyl copol

1976-07-26

1978-10-31

Schilling, Richard L.

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

96 3, 96 29D, G03C 700, G03C 554, G03C 140

Patent

active

041232755

ABSTRACT:
In a color diffusion transfer photographic material comprising a photosensitive element including at least one light-sensitive silver halide emulsion layer having a dye image providing material associated therewith, an image receiving element for fixing the diffusible dye formed from said dye image providing material to form a dye image, an alkaline processing composition capable of developing the exposed photosensitive element, and, if necessary, a hydrophilic colloid layer, the photographic material further having neutralizing means for reducing the pH of the alkaline processing composition. The stability of the transferred dye image formed in the image receiving element is improved by incorporating in the neutralization rate controlling layer of the neutralizing means a copolymer of a vinyl compound and an unsaturated monomer, said copolymer having the recurring structural unit represented by the general formula: ##STR1## wherein R represents a hydrogen atom, an aliphatic group having 1 to 10 carbon atoms, or an aryl group.

REFERENCES:
patent: B351673 (1975-01-01), Fleckenstein et al.
patent: 3421893 (1969-01-01), Taylor
patent: 3615422 (1971-10-01), Hablerin
patent: 3847615 (1974-11-01), Yoshida et al.

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