1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ETCHING (Dutch, etsen, to eat), a form of engraving (q.v.) in which, in contradistinction to line engraving (q.v.), where the furrow is produced by the ploughing of the burin, the copper is eaten away or corroded by acid. To prepare a plate for etching it is first covered with etchingground, a composition which resists acid. The qualities of a ground are to be so adhesive that it will not quit the copper when a small quantity is left isolated between lines, yet not so adhesive that the etching point cannot easily a…
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- Vol. 9, pp. 804-806