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RDA Production Method
A production method consisting of creating marks on the surface of a hard material, such as metal or glass, by incising with a sharp tool. In printing, the intaglio process in which the design is incised into a printing plate, usually a flat copper plate, with the aid of a graver or burin that is held in the palm of the hand and pushed against the copper to cut lines comprising V-shaped grooves. The plate is then inked up, wiped so that ink is retained in the grooves and then forced out under the pressure of the printing process to create lines on the paper. The technique was first developed in the early 15th century in Germany. Historically, "engraving" has sometimes been used incorrectly to refer to all printmaking processes, particularly any process employing printing plates.