Photoengraving articles of zinc-free magnesium-based alloys and

Details Photoengraving articles of zinc-free magnesium-based alloys and Photoengraving articles of zinc-free magnesium-based alloys and

1986-08-21

1988-06-14

Rutledge, L. Dewayne

Radiation imagery chemistry: process, composition, or product th

Imaged product

Structurally defined

1566591, 156905, 420402, 420407, 430279, 430310, B41N 302, C22C 2302

Patent

active

047511621

ABSTRACT:
A photoengraving article is provided formed of an essentially zinc-free magnesium-based alloy which also contains an amount of calcium effective to control lateral etching and improvement the sharpness of the resultant etched pattern. A method of forming a photoengraved article is also provided. The method comprises the steps of forming a photoengraving article from a photoengraving alloy and etching a pattern on the article in an etching bath. The improvement that comprises forming the photoengraving article from essentially zinc-free magnesium-based alloys containing an amount of calcium effective to control the lateral etching and improve the clarity of the resultant pattern. The article and method do not release zinc into the etching bath. Ultimate release of zinc into the environment is also reduced.

REFERENCES:
patent: 1698647 (1929-01-01), Michel
patent: 3340195 (1967-09-01), Borth et al.

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