Color diffusion transfer process, element and composition therefor

Claim 1

A PROCESS OF FORMING A TRANSFER IMAGE IN COLOR WHICH COMPRISES EXPOSING A PHOTOSENSITIVE ELEMENT COMPRISING AT LEAST ONE SILVER HALIDE EMULSION, EACH OF SAID SILVER HALIDE EMULSIONS HAVING ASSOCIATED THEREWITH A DYE DEVELOPER, EACH OF SAID DYE DEVELOPERS CONTAINING A HYDROXYSUBSTITUTED BENZENOID SILVER HALIDE DEVELOPING RADICAL, DEVELOPING SAID EXPOSED PHOTOSENSITIVE ELEMENT, FORMING IN IN UNDEVELOPED AREAS OF EACH SAID SILVER HALIDE EMULSION, AS A FUNCTION OF SAID DEVELOPMENT, AN IMAGEWISE DISTRIBUTION OF SAID ASSOCIATED DYE DEVELOPER IN UNOXIDIZED, DIFFUSIBLE CONDITION, AND TRANSFERRING, BY DIFFUSION, AT LEAST A PORTION OF EACH SAID IMAGEWISE DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER TO A SUPERPOSED IMAGE-RECEIVING LAYER TO FORM SAID COLOR TRANSFER IMAGE, PROCESS INCLUDING THE STEP OF EFFECTING SAID DEVELOPING AND TRANSFER IN THE PRESENCE OF AT LEAST ONE ONIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF QUATERNARY AMMONIUM, QUARTERNARY PHOSPHONIUM AND TERIARY SULFONIUM COMPOUNDS, SAID ONIUM COMPOUND BEING PROVIDED BY APPLICATION TO SAID PHOTOSENSITIVE ELEMENT OF AN AQUEOUS ALKALINE PROCESSING SOLUTION CONTAINING SAID ONIUM COMPOUND.