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Etching

Etching


The etching 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 ink . The plate is sprinkled evenly with a covering to protect from ( wax , asphalt, rubber , cement ... ) is smoked with a bunch of candles . Then you will affect the drawing in the protective material with a tip sottile.S'immerge 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 be engraved , for get deep excavations otherwise . The acid affects the metal only where unprotected . 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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