Lithographic light trap and process

Details Lithographic light trap and process Lithographic light trap and process

G - Physics

03

C

96/211, 204/11.5

G03C 1/52 (2006.01) G03F 7/20 (2006.01)

Patent

CA 1249944

A B S T R A C T A planar light trap and, more particularly, a laser imagable lithographic printing plate, and process for making same. A photosensitive organic material such as a diazo resin is coated on a grained and anodized aluminum sheet. The topography of the sheet traps and converts a substantial portion of incident laser radiation, which passes through the organic coating without substantially affecting same, into radiation that will change the organic coating upon emerging from the light trap. The converted radiation alters the solubility of the diazo resin and renders it ink-loving.

483510

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