Process for the production of masked positive color images by the silver dye bleach process using silver complex diffusion

Process for the production of masked subtractive positive colour images in accordance with the silver dye bleach process, by exposure, silver development, dye bleaching, silver bleaching and fixing, using a photographic material which contains, in each of at least two layers, a dyestuff which can be bleached imagewise, and of which the absorption maximum corresponds to one of the primary colours red, green and blue, with a silver halide emulsion layer sensitive to a particular spectral region being allocated to each dyestuff, which process comprises employing a photographic material in which

• (a) a silver halide emulsion layer consisting at least partially of silver iodide is allocated to the dyestuff, of which the undesired parasitic colour density is to be compensated,
• (b) in a further layer, at least one second dyestuff, of which the main colour density corresponds to a parasitic colour density, requiring compensation, of the first dyestuff, and a silver halide emulsion free from iodide ions, are present,
• (c) a further layer, which is adjacent to that containing the second dyestuff, contains colloidal nuclei which are capable of depositing metallic silver from soluble silver complexes,
• (d) a separating layer is present between the layer containing the nuclei and the dyestuff layer, of which the parasitic colour density is to be compensated,
• and which process also comprises employing a silver devolper bath containing a ligand, which is able to produce water-soluble silver complexes which are capable of diffusion.