Color xerography

Claim 1

THE PROCESS OF COLOR XEROGRAPHY COMPRISING PROJECTING A LIGHT IMAGE CONSISTING OF A PATTERN OF LIGHT AND SHADOW OF AT LEAST A FIRST AND A SECOND PRIMARY COLOR ONTO AND THROUGH A FIRST PHOTOCONDUCTIVE INUSLATING LAYER ADHERENT ON A SUBSTANTIALLY TRANSPARENT CONDUCTIVE MEMBER AND ONTO A SECOND PHOTOCONDUCTIVE INSULATING LAYER ADHERENT ON THE OPPOSITE SIDE OF SAID MEMBER WHILE MAINTAINING AN ELECTRIC FIELD THROUGH SID LAYERS TO FORM AN ELETROSTATIC LATENT IMAGE THEREON, SAID FIRST PHOTOCONDUCTIVE LAYER BEING CONDUCTIVELY SENSITIVE TO LIGHT OF AT LEAST ONE FIRST PRIMARY COLOR, AND BOTH SUBSTANTIALLY TRANSPARENT TO AND SUBSTANTIALLY INSENSITIVE TO LIGHT OF AT LEAST ONE SECOND PRIMARY COLOR, SAID SECOND PHOTOCONDUCTIVE INSULATING LAYER BEING CONDUCTIVELY SENSITIVE TO LIGHT OF AT LEAST SAID SECOND PRIMARY COLOR, ONE OF SAID PHOTOCONDUCTIVE LAYERS CONSISTING ESSENTIALLY OF A DISPERSION IN A TRANSPARENT INSULATING BINDER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE, CADMIUM SULFIDE, MIXED ZINC, SULFIDE-CADUMIUM SULFIDE, ZINC SULFIDE, ZINC SELENIDE AND TITANIUM DIOXIDE, AND THE OTHER OF SAID PHOTOCONDUCTIVE LAYERS CONSISTING ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF VITREOUS SELENIUM, A DISPERSION OF MIXED CADMIUM SELENIDE-ZINC SELENIUM IN A TRANSPARENT INSULATING BINDER, A DISPERSION OF MIXED LEAD OXIDEZINC OXIDE IN A TRANSPARENT INSULATING BINDER, AND A DISPERSION OF MIXED MERCURIC SULFIDE-ZINC OXIDE IN A TRANSPAREN INSULATING BINDER, DEVELOPING SAID LATENT IMAGES WITH COLORED FINELY DIVIDED PARTICLES OF COLOR COMPLEMENTARY TO SAID FIRST AND SECOND PRIMARY COLORS RESPECTIVELY, AND SUPERPOSING THE DEVELOPED COLOR IMAGE FOR THE FIRST PRIMARY COLOR WITH THE DEVELOPED IMAGE FOR THE SECOND PRIMARY COLOR ON A COMMON SUPPORT LAYER.