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ETCHING ACQUATINT
etching aquatint numbered limited
What is the etching
The etching technique was known since ancient times and was used to engrave decorations on weapons. Some of the first to use it for art prints were Albrecht Dürer in Germany and Parmigianino in Italy [1].
It is an intaglio widespread corrode consisting in a sheet of metal (usually zinc, copper, for large runs, as in the past) with an acid, to obtain images to be transposed on a support (usually paper) by means of colors. The slab thickness necessary, commercially available, is cleaned and bevelled edges with emery paper, then defatted in the shiny part with cotton wool soaked, for example, with Spanish white (calcium carbonate) dissolved in water. Sprinkled evenly with a covering to protect from (wax, asphalt, rubber, cement ...) is smoked with a bunch of candles. So it affects design in protective material with a fine point (freehand or reviewing a draft on paper decalcante clear), to expose the metal at the signs that appear on paper with ink. Submerges the plate in acid (after having sprinkled covering the rear face) starting the etching, which can be made several times as discovering the parts to affect, to obtain otherwise deep excavations. The acid affects the metal only where unprotected. Judged complete the plate, washed with petrol or white spirit, the dries and is held as a matrix of the design to be replicated. Printing occurs at the printing press on little cards collate and moistened before, sprinkling ink with a fat wad of skin plate and heating it a little to promote the penetration of the dye in the furrows and its transfer to the paper, after cleaning the parts that will be white on the printed sheet.
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