Photographic films

Claim 1

A DIFFUSION TRANSFER REVERSAL PROCESS FOR OBTAINING A POSITIVE TRANSFER IMAGE IN SILVER WHICH COMPRISES THE STEPS OF EXPOSING A PHOTOSENSITIVE ELEMENT COMPRISING A PLURALITY OF LAYERS, AT LEAST ONE OF SAID LAYERS COMPRISING A SUPPORT, AT LEAST ONE OF SAID LAYERS COMPRISING A PHOTOSENSITIVE SILVER HALIDE EMULSION, AND AT LEAST ONE OF SAID LAYERS COMPRISING AN OUTERMOST, COLORED, ALKALI-PERMEABLE, TRANSPARENT LAYER CONTAINING A SUBSTANTIALLY UNIFORM CONCENTRATION OF PIGMENT DISPERSED THEREIN, SAID TRANSPARENT LAYER BEING SO POSITIONED AS TO ACT AS A PHOTOGRAPHIC LIGHT FILTER DURING EXPOSURE OF SAID SILVER HALIDE EMULSION BY LIGHT TRANSMITTED THROUGH SAID LAYER TO THEREBY EFFECT A SUBSTANTIALLY UNIFORM FILTRATION OF THE INCIDENT LIGHT WITHIN A PREDETERMINED PORTION OF THE SPECTRUM, DEVELOPING SAID EXPOSED SILVER HALIDE EMULSION IN THE PRESENCE OF A SILVER HALIDE SOLVENT, REACTING UNREDUCED AND UNDEVELOPED SILVER HALIDE IN SAID EMULSION WITH SAID SILVER HALIDE SOLVENT TO FORM AN IMAGEWISE DISTRIBUTION OF SOLUBLE SILVER COMPLEX, TRANSFERRING, BY INHIBITION, THROUGH SAID TRANSPARENT LAYER, AT LEAST PART OF SAID IMAGEWISE DISTRIBUTION TO AN IMAGE-RECEIVING MATERIAL CONTIGUOUS WITH SAID TRANSPARENT LAYER, PRECIPATING SAID SOLUBLE SILVER COMPLEX TO SILVER TO PROVIDE A POSITIVE IMAGE IN SAID IMAGE-RECEIVING MATERIAL, SEPARATING SAID IMAGE-RECEIVING MATERIAL FROM ITS CONTIGUOUS RELATIONSHIP WITH SAID TRANSPARENT LAYER, SUBSEQUENT TO IMAGE FORMATION, SAID DEVELOPMENT, TRANSFER AND IMAGE FORMATION BEING EFFECTED TO THE SUBSTANTIAL EXCLUSION OF ANY TRANSFER AND REACTION OF SAID PIGMENT.