Method for the preparation of a planographic printing master
Abstract
Abstract AN IMPROVEMENT ON U.S.P. 3,476,937 WHEREIN SILVER HALIDE GRAINS OF THE INTERNAL IMAGE-FORMING TYPE ARE DIRECTLY INCORPORATED IN THE HEAT-SENSITIVE LAYER OF THE BASIC PATENT FORMED BY NORMALLY SOLID THERMOPLASTIC POLYMER PARTICLES DISPERSED INA HYDROPHILIC BINDER SO THAT BY EXPOSING THE RESULTANT LAYER TO A LIGHT IMAGE, PHOTOGRAPHICALLY DEVELOPING THE EXPOSED LAYER WITH A PHOTOGRAPHIC DEVELOPING LAYER TO OBTAIN A DIRECT-POSITIVE SILVER IMAGE HAVING A DENSITY OF AT LEAST 0.1 ABOVE BACKGROUND, AND UNIFORMLY EXPOSING THE DEVELOPED LAYER TO RADIATION ABSORBED BY THE SILVER IMAGE AND CONVERTED INTO HEAT, SUFFICIENT HYDROPHOBIC/HYDROPHILIC DIFFERENTIATION IS OBTAINED AS TO ADAPT THE RESULTANT MATERIAL FOR USE AS A PLANOGRAPHIC PRINTING MASTER.
Inventors
- 👤 Marcel Nicolas
- 👤 Gerald Laurens Vanreusel
- 👤 Paul Desire Van Pee
- 👤 Jules Maria De Laet
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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