Photochemical delivery article and method of use
AssigneeEastman Kodak Company
InventorsAllan F. Sowinski, Richard P. Szajewski, Nigel R. Wildman
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Abstract
Image formation in photosensitive materials can be simplified by photoprocessing the imagewise exposed materials using photochemical delivery articles that consist essential of nonporous substrate and a hydrogel that contains the one or more photochemicals needed for image formation. The delivery articles can be laminated or other wise contacted with the imaged photographic materials on the silver halide emulsion side allowing photochemicals to diffuse into and out of the materials for the desired chemical reactions. Multiple delivery articles can be used in sequence to provide the desired sequence of photochemical reactions.
Claims29
A photochemical delivery article consisting essentially of a nonporous substrate having disposed thereon a hydrogel containing one or more diffusible photochemicals.
A photochemical delivery article consisting essentially of a nonporous, dimensionally stable substrate having disposed thereon a poly(ethyleneoxide)hydrogel containing one or more diffusible color development photochemicals.
A non-diffusion transfer method of providing an image in an imagewise exposed photographic silver halide material comprising at least one silver halide emulsion layer, said method comprising contacting a photochemical delivery article with said silver halide emulsion layer of said imagewise exposed photographic material to form a laminate to bring them into reactive association for a sufficient time to cause a photochemical reaction,
- said photochemical delivery article consisting essentially of a nonporous substrate having disposed thereon a hydrogel containing one or more diffusible photochemicals.
A method of providing a color image in an imagewise exposed color photographic silver halide material comprising at least one silver halide emulsion layer, said method comprising contacting the silver halide emulsion layer of said silver halide material to bring it into reactive association with said with first and second photochemical delivery articles, in sequence, to form laminates for a sufficient time to cause sequential photochemical reactions,
- said first photochemical delivery article consisting essentially of a nonporous substrate having disposed thereon a hydrogel containing a color developing agent, and
- said second photochemical delivery article consisting essentially of a nonporous substrate having disposed thereon a hydrogel containing a photographic bleaching agent, a photographic fixing agent, or both.
A photochemical delivery article consisting essentially of a nonporous substrate having disposed thereon a hydrogel containing one or more diffusible photochemicals and a reinforcing material.
A photochemical delivery article consisting essentially of a nonporous substrate having disposed thereon a hydrogel containing one or more diffusible photochemicals, and a removable cover sheet on the opposite side of said hydrogel.
Dependencies are inferred from the claim text.