PROCESS FOR THE PRODUCTION OF A MULTICOLOUR IMAGE BY IMAGE-WISE DYE DIFFUSION TRANSFER

摘要

Process for the production of a multi-colour dye image by dye diffusion transfer operating with a photographic multilayer multicolour material containing different non-diffusing dyes or dye precursor compounds that when contacted with an aqueous alkaline liquid remain immobile in an alkali-permeable colloid layer but are capable of being reduced by a developing agent at a rate slower than the reduction of image-wise developable silver halide and in reduced state under alkaline conditions are capable of releasing a diffusible dye or dye precursor moiety, and wherein dye images with higher colour saturation are obtained by more extensive oxidation of developing agent in the image-wise photoexposed area due to the use in the alkaline processing liquid of a silver halide solvent forming an alkali-soluble and reducible silver complex compound.