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Plate-en-grav′ing.

A mode of engraving as distinct from the relief engraving on wood. The lines are cut into the plate, are filled with ink, and the surface is wiped clean and polished; soft paper is laid on the plate, and both are run through a roller-press. See copperplate-engraving, pages 618, 619.

Engraved plates are multiplied by the electroplat-ing process.

1. A reverse of the plate is obtained by deposition of copper in the bath. This mold is in cameo, and from this as many intaglio copies of the original may be obtained as may be desired.

2. An impression of the plate is taken on thin paper with an ink of gum-dammar, oxide of iron, and essence of turpentine. This is transferred to a copper plate; the paper is removed by washing, and the cameo thus obtained is placed in the bath for the deposition of an intaglio for the printer.

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