Single impression multicolor printing

Abstract

Abstract THIS INVENTION RELATES TO THE ART OF COLOR PRINTING WHEREIN MULTI-COLOR REPRODUCTIONS RE MADE WITH A CONVENTIONAL BLACK AND WHITE FIRST PRINTING PLATE AND A SECOND, SINGLE, MULTICOLOR PRINTING PLATE. THE INVENTION IS CHARACTERIZED, IN PART, BY THE SECOND PLATE WHICH COMPRISES A BASE LAYER, A LAYER OF MICROBEADS DISTRIBUTED OVER SAID BASE LAYER AND, IN A PREFERRED EMBODIMENT, AN OVER-COATING OF A NEUTRAL DENSITY FILTER. THE MICROBEADS COMPRISE A SOURCE OF A COLOR-FORMING MATERIAL COATED FIRST WITH A LAYER OF A LIGHT SENSITIVE MATERIAL AND A SECOND LAYER OF A PHOTOGRAPHIC COLOR FILTER. THREE DISTINCT TYPES OF MICROBEAD ARE USED, ONE RESPONSICE TO EACH OF THE THREE PRIMARY COLORS, RED, YELLOW AND BLUE. THE PRINTING PROCESS COMPRISES FORMING SEPARATE COLOR SEPARATION NEGATIVES IN CONVENTIONAL MANNER, EXPOSING THE SINGLE, MULTICOLOR PRINTING PLATE TO EACH OF THE COLOR SEPARATION NEGATIVES USING THE APPROPRIATE COLORED LIGHT AND PROCESSING SAID PLATE TO REMOVE LIGHT EXPOSED PORTIONS OF THE LIGHT SENSITIVE MATERIAL THEREBY MAKING AVAILABLE RED COLOR-FORMING FROM THOSE MICROBEADS EXPOSED TO RED LIGHT, YELLOW COLOR-FORMER FROM THOSE MICROBEADS EXPOSED TO YELLOW LIGHT AND BLUE COLOR-FORMER FROM THOSE MICROBEADS EXPOSED TO BLUE LIGHT. THE AMOUNT OF COLOR-FORMER MADE AVAILABLE DETERMINES THE DEPTH OF COLOR OF THE FINAL PRINT AND THIS IS IN TURN GOVERNED BY THE QUALITY OF LIGHT PASSING THROUGH THE NEUTRAL DENSITY FILTER TO THE MICROBEAD. THE PRINTING PLATE SO DEVELOPED IS THEN CONTACTED WITH AN INK WHICH CONTAINS A SECOND COMPONENT OF THE COLOR-FORMER CAPABLE OF REACTING WITH THE FIRST COMPONENT TO THEREBY PROVIDE THE PRIMARY COLORS RED, YELLOW AND BLUE IN THE CORRESPONDING, EXPOSED AND DEVELOPED MICROBEAD. UPON CONTACT OF THE FIRST COMPONENT OF THE COLOR-FORMER ON THE PRINTING PLATE WITH THE SECOND COMPONENT OF THE COLOR-FORMER IN THE INK, A COLOR IS PRODUCED IN EACH OF THE DEVELOPED MICROBEADS WHICH COLOR IS EQUIVALENT TO A COLOR DOT IN A CONVENTIONAL PRINTING PROCESS. CONSEQUENTLY, A COLORED ILLUSION IS OBTAINED HAVING ALL OF THE COLORS AND HUES READY FOR TRANSFER TO A TRANSFER SURFACE.

Inventors

• 👤 S Grohe

Bibliographic Details