Etching is an intaglio method of printmaking in which the image is incised into the surface of a metal plate using an acid.
The acid eats the metal, leaving behind roughened areas, or if the surface exposed to the acid is very narrow, burning a line into the plate. The process is believed to have been invented by Daniel Hopfer (circa 1470-1536) of Augsburg, Germany, who decorated armour in this way, and applied the method to printmaking.
There are many ways for the printmaker to control the acid’s effects. Most typically, the surface of the plate is covered in a hard, waxy ‘ground’ that resists acid. The printmaker then scratches through the ground with a sharp point, exposing lines of metal that are attacked by the acid. Once the drawing in the ground is finished, the plate is submerged in acid for a period of time; longer submersion means that deeper lines are etched. The ground may be removed, or the artist may continue drawing in it, etching it again in acid to deepen existing lines while adding new lines. The ground may also be reapplied to protect existing lines while adding new ones. The ground may be removed and the plate printed to see its current printing state, to be followed by more work (or other techniques, such as aquatint, drypoint, or engraving); thus, many of Rembrandt’s etchings exist in several distinct forms, with the final, “accepted” version apparently preceded by many artist’s proofs.
Printing the plate is done by covering the surface with ink, then rubbing the ink off the surface with tarlatan cloth or newsprint, leaving ink in the roughened areas and lines. Damp paper is placed on the plate, and both are run through a printing press; the pressure forces the paper into contact with the ink, transferring the image (c.f., chine-coll
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101-1669 West 3rd Ave.
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