Photographic element and method
AssigneePolaroid Corporation
InventorsDaniel J. Churella, Wilhelm J. Erdmann, Gerard Gomes, John R. Linton, Francis M. Pierce
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Abstract
There is described a novel diffusion transfer photographic system wherein an exposed diffusion transfer photographic film unit is developed with an aqueous alkaline processing composition in the presence of alumina-free titanium dioxide.
Claims21
A method for forming a diffusion transfer image comprising the steps of:
- exposing a photosensitive element comprising a first support carrying at least one silver halide emulsion layer to an imagewise pattern of radiation;
- and
- developing said exposed photosensitive element in the presence of alumina-free titanium dioxide by applying an aqueous alkaline processing composition whereby an image is formed on an image-receiving layer.
A method as defined in claim I wherein said image-receiving layer is carried by a second support.
A diffusion transfer photographic film unit which comprises:
- a support;
- a photosensitive element comprising at least one silver halide emulsion layer;
- an image-receiving layer;
- an aqueous alkaline processing composition;
- and alumina-free titanium dioxide.
An aqueous alkaline processing composition for use with a diffusion transfer photographic film unit which comprises:
- a thickening agent, a silver halide solvent, and alumina-free titanium dioxide.
A processing composition as defined in claim 19 which comprises from about 35% by weight to about 50% by weight of said alumina-free titanium dioxide.
Dependencies are inferred from the claim text.