Photographically producing molecularly dispersed dye images

Abstract

Abstract PROCESS OF MOLECULARLY DISPERISING PARTICULATE DYE IMAGES WHEREIN POWDER PARTICLES COMPRISING A CARRIER AND A DYE, HELD IN IMAGEWISE CONFIGURATION IN PARTICULATE FORM IN OR ON A SUBSTRATE, ARE CONTACTED WITH VAPORS OF A MATERIAL, WHICH IS A SOLVENT FOR SAID DYE, CAPABLE OF SWELLING SAID CARRIER AND INCAPABLE OF SWELLING THE SURFACE OF SAID SUBSTRATE, MOLECULARLY DISPERSING SAID DYE IN SAID CARRIER. LINE, CONTINUOUS-TONER OR HALF-TONE IMAGES ARE PREFERABLY PRODUCED BY EXPOSING TO ACTINIC RADIATION IN IMAGE-RECEIVING MANNER A SUBSTRATE BEARING A POSITIVE-ACTING OR NEGATIVE-ACTING LIGHT-SENSITIVE ORGANIC LAYER HAVING A THICKNESS OF AT LEAST 0.1 MICRON, SAID LAYER BEING CAPABLE OF DEVELOPING A RD OF 0.2 TO 2.2; CONTINUING THE EXPOSURE TO EITHER CLEAR THE BACKGROUND OF POSITIVE-ACTING LIGHTSENSITIVE LAYERS OR TO ESTABLISH A POTENTIAL RD OF 0.2 TO 2.2 WITH NEGATIVE-ACTING LIGHT-SENSITIVE ORGANIC LAYER; APPLYING TO SAID LAYER OF ORGANIC MATERIAL, FREE FLOWING POWDER PARTICLES HAVING A DIAMETER, ALONG AT LEAST ONE AXIS OF AT LEAST ABOUT 0.3 MICRON BUT LESS THAN 25 TIMES THE THICKNESS OF SAID ORGANIC LAYER WHEREIN SAID POWDER PARTICLES COMPRISE A SOLID CARRIER AND DYE; WHILE THE LAYER IS AT A TEMPERATURE BELOW THE MELTING POINTS OF THE POWDER AND OF THE ORGANIC LAYER, PHYSICALLY EMEDDING SAID POWDER PARTICLES AS A MONOLAYER IN A STRATUM AT THE SURFACE OF SAID LIGHT-SENSITIVE LAYER TO YIELD IMAGES HAVING PORTIONS VARYING IN DENSITY IN PROPORTION TO THE LIGHT EXPOSURE OF EACH PORTION, REMOVING NON-EMBEDDED PARTICLES FROM SAID ORGANIC LAYER TO DEVELOP AN IMAGE; AND MOLECULARLY DISPERSING DYE INTO SAID CARRIER BY CONTACTING THE PARTICLES EMBEDDED IN SAID ORGANIC LAYER WITH VAPORS OF A MATERIAL WHICH IS A SOLVENT FOR SAID DYE, CAPABLE OF SWELLING SAID CARRIER AND INCAPABLE OF SWELLING THE SURFACE OF SAID SUBSTRATE.

Inventors

• 👤 Rexford W Jones
• 👤 William B Thompson

Bibliographic Details