Photographic processing composition with poly(diacetone acrylamide) oxime and styrene-butadiene latex
AssigneePolaroid Corporation, Patent Dept.
InventorRichard J. Murphy
Life of this patent
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Abstract
Photographic processing compositions containing a light-reflecting pigment and a styrene-butadiene copolymer are disclosed. The photographic processing compositions are useful in photographic diffusion transfer film units and processes for the provision of permanent photographic laminates. A light-reflecting layer formed in a photographic laminate from such a processing composition exhibits a reduced tendency toward cohesion or adhesion failure and separation.
Claims9
A photographic processing composition comprising an aqueous alkaline medium having therein:
- a polymeric oxime viscosity-increasing agent comprising recurring units of the formula ##STR13## said polymeric oxime viscosity-increasing agent being present in an amount in the range of about 0.5% to about 1% by weight of the composition;
- a light-reflecting pigment;
- and a carboxylated styrene-butadiene latex, said carboxylated styrene-butadiene latex being present in an amount in the range of about 1.5% to about 3% by weight of the composition.
A photographic product for forming a diffusion transfer image within a permanent laminate comprising, in combination, a first support carrying at least one photosensitive silver emulsion layer, each said silver halide emulsion having associated therewith an image-forming material;
- a second support carrying an image-receining layer;
- and a photographic processing composition adapted to be distributed between the silver halide layer or layers and the image-receiving layer and effective to develop the silver halide emulsion or emulsions after photoexposure and form a transfer image in said image-receiving layer and effective to mask the developed silver halide layer or layers and provide a light-reflecting background for the viewing of said transfer image, said photographic processing composition comprising an aqueous alkaline medium having therein:
- a polymeric oxime viscosity-increasing agent comprising recurring units of the formula ##STR14## said polymeric oxime viscosity-increasing agent being present in an amount in the range of about 0.5% to about 1% by weight of the composition;
- a light-reflecting pigment;
- and
- a carboxylated styrene-butadiene latex, said carboxylated styrene-butadiene latex being present in an amount in the range of about 1.5% to about 3% by weight of the composition.
Dependencies are inferred from the claim text.