In etching, a waxy acid-resist, known as a ground, is applied to a metal plate, most often copper or zinc, and allowed to harden, after which the artist "smokes" the plate.

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Keywords: art, artist, colorized, engraving, enhanced, etching, figuier, grandes, history, illustration, intaglio, inventions, les, louis, plate, printmaking, process, science, smoking, technique