Photographic diffusion transfer color process and composite film unit for use therein

Abstract

Abstract THE INVENTION RELATES TO A COMPOSITE PHOTOGRAPHIC FILM UNIT STRUCTURE WHICH COMPRISES A PLURALITY OF ESSENTIAL LAYERS INCLUDING, IN SEQUENCE, A FIRST DIMENSIONALLY STABLE, LIQUID IMPERMEABLE LAYER; A POLYMERIC LAYER CONTAINING SUFFICIENT ACID TO EFFECT REDUCTION OF AN AKALINE PROCESSING COMPOSITION HAVING A FIRST PH AT WHICH A DYE IMAGEFORMING MATERIAL IS SUBSTANTIALLY SOLUBLE AND DIFFUSIBLE AS A FUNCTION OF THE EXPOSURE OF ITS ASSOCIATED SILVER HALIDE LAYER TO A SECOND PH AT WHICH SAID DYE IMAGEFORMING MATERIAL IS SUBSTANTIALLY NONDIFFUSIBLE; ONE OR MORE PHOTOSENSITIVE SILVER HALIDE LAYERS EACH HAVING ASSOCIATED THEREWITH A DYE IMAGE-FORMING MATERIAL WHICH IS SOLUBLE AND DIFFUSIBLE, IN ALKALI, AT THE FIRST PH, AS A FUNCTION OF THE SILVER HALIDE LAYER''S EXPOSURE; A POLYMERIC LAYER DYEABLE BY THE DYE IMAGE-FORMING MATERIALS; AND A SECOND DIMENSIONALLY STABLE, LIQUID IMPERMEABLE TRANSPARENT LAYER. THE FILM UNIT STRUCTURE ADDITIONALLY INCLUDES MEANS SECURING THE RESPECTIVE LAYERS IN SUBSTANTIALLY FIXED RELATIONSHIP AND A RUPTURABLE CONTAINER RETAINING AN ALKALINE PROCESSING COMPOSITION POSSESSING THE FIRST PH AND, PREFERABLY, OPACIFYING AGENT IN A QUANTITY SUFFICIENT TO MASK THE DYE IMAGE-FORMING MATERIAL ASSOCIATED WITH THE SILVER HALIDE LAYERS MOUNTED TRANSVERSE A LEADING EDGE OF THE STRUCTURE TO EFFECT DISCHARGE OF THE CONTAINER''S CONTENTS BETWEEN THE DYEABLE POLYMERIC LAYER AND NEXT ADJACENT SILVER HALIDE LAYER DURING PHOTOGRAPHIC DIFFUSION TRANSFER COLOR PROCESSING IN ACCORDANCE WITH INVENTION.

Inventors

• 👤 Edwin H Land

Bibliographic Details