A technical dictionary of printmaking, André Béguin.
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bimetal_plates
bimetallic plates Lithographic plates in which the printing image base is formed of one metal and the bon-printing area of a second meval. Generally, the printing area is formed of copper, while the non printing areas may be nickel, chromium, or stainless steel. Some plates employ a third metal as a base or backing and could be regarded as trimetallic, multimetallic or polymetallic. Both surface and deep-etch platemaking techniques are used in the making of such plates. With a plating of chromium on copper sheet, the resist stencil of deep-etch method permits etching chromium from image to reach copper for base of lithographic image; with plating of copper on stainless steel base, surface platemaking methods temporarily protect the image while copper is etched away to give stainless steel for non-printing areas of plate.
f plaques bimétalliques d Bimetallplatten n bimetaalplaten.
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