Laser engraving of photopolymer printing plates

Details Laser engraving of photopolymer printing plates Laser engraving of photopolymer printing plates

1992-07-15

1993-11-09

Burr, Edgar S.

Printing

Printing members

Blanks and processes

430256, 430306, 430327, 430945, B41N 303, G03F 736

Patent

active

052593118

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.

REFERENCES:
patent: 3506779 (1970-04-01), Brown et al.
patent: 4384011 (1983-05-01), Aoyama et al.
patent: 4388865 (1983-06-01), Kellner
patent: 4877644 (1989-10-01), Wu et al.

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