A Photogravure was a popular form of reproducing an image on paper prior to modern mass produced print methods and photographs, especially around the late c1800's to early 1900's. It is a type of chemical or photo-etching. To create a photogravure, a photographic film is treated with a mordant (chemical) before being placed face down on a metal plate. The mordant eats or etches small depressions into the plate so that when ink and paper are applied under pressure the image is transposed onto the paper. This pressure applied is why a PLATE IMPRINT is sometimes mentioned (although if the edge of the engraved plate is off the paper then the imprint is not visible). Photogravures are more subtle than etchings and engravings because the plate depressions created by the photo-chemical process are rounded - not the more defined lines created by engraving/etching.
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30 October 2007
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