Visible light bichromate process and material

Claim 1

IN THE BICHROMATE PHOTOGRAPHIC REPRODUCTION PROCESS, IN WHICH A SOLUBLE POLYMER CROSS-LINKABLE INTO INSOLUBLE FORM BY REDUCED BICHROMATE AND CONTAINING A BICHROMATE IS IRRADIATED WITH A LIGHT IMAGE TO THEREBY SELECTIVELY RENDER THE IRRADIATED PORTIONS INSOLUBLE, THE IMPROVEMENT, WHICH COMPRISES USING THE SOLUBLE POLYMER ADDITIONALLY CONTAINING A DISSOLVED PHOTO-REDUCIBLE DYE AND A REDUCING AGENT HAVING A REDUCTION POTENTIAL INCAPABLE OF REDUCING SAID BICHROMATE AND INCAPABLE OF REDUCING SAID DYE IN THE ABSENCE OF LIGHT, BUT OF SUFFICIENT STRENGTH TO REDUCE SUBSTANTIALLY ONLY THE PHOTO-EXCITED DYE, SAID DYE, BICHROMATE AND REDUCING AGENT FORMING A STABLE SYSTEM IN THE ABSENCE OF LIGHT WHICH UNDERGOES REDUCTION OF THE DYE UPON EXPOSURE TO VISIBLE LIGHT, SAID DYE AND REDUCING AGENT BEING PRESENT IN SUFFICIENT AMOUNT SO THAT WHEN IRRADIATED WITH VISIBLE LIGHT THE DYE WILL BE REDUCED AND THE REDUCED DYE WILL IN TURN REDUCE AT LEAST A PORTION OF SAID BICHROMATE AND EFFECTING SAID IRRADIATION WITH A VISIBLE LIGHT IMAGE OF SUFFICIENT INTENSITY AND DURATION TO PHOTO-EXCITE AT LEAST A PORTION OF SAID DYE.