Laser engraving of photopolymer printing plates
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United States of America Patent
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Nov 9, 1993
Grant Date -
N/A
app pub date -
Jul 15, 1992
filing date -
Jul 15, 1992
priority date (Note) -
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Abstract
A method for laser engraving photopolymer printing plates is provided. Prior to the laser engraving step (30), the photopolymer material is totally cured, followed by removal of a release layer disposed on the material. The laser engraving step (30) which follows removal of the release layer produces a plurality of tacky particulates (120) which adhere to the surface layer of the photopolymer material (100) adjacent the ablated regions (110). The particulates (120) are removed in a solvent washing step (40) to provide clean sharp edges (115) adjacent the ablated regions (110). Subsequent to removal of the photopolymer residue (120) the engraved printing plate is finished, by either chemical or light finishing methods.
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