Method and apparatus for multi-color laser engraving

Details Method and apparatus for multi-color laser engraving Method and apparatus for multi-color laser engraving

1990-09-28

1993-06-01

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Readily visible image formation

430297, 430945, 148244, 20415741, 427 531, 427154, 427556, G03C 500

Patent

active

052158640

ABSTRACT:
A method and apparatus for engraving a metal plate in two or more colors. Selected areas of an oxidized aluminum plate are colored by a first dye to which the plate has an affinity. The selected areas may then be sealed by hydration. Portions of the selected areas of the colored oxidized aluminum plate can then be further engraved by the application of a focussed laser beam, which removes any of the first dye and the sealant, thereby restoring the affinity of the selected portions of the plate. The areas of the plate having an affinity for dyes can be colored by secondary and additional colors and shades thereof.

REFERENCES:
patent: 3833374 (1974-09-01), Patrick
patent: 3841891 (1974-10-01), Pallant

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