Etching indicates a set of techniques which consist in engraving the surface of a support, obtaining result by printing a matrix engraved and inked on a sheet. The term "chalcography" is also used and indicates the art to engrave on copper and, by extension, all techniques of engraving using boards, matrices, or metal. The line-soft engraving term is also used, grouping processes of intaglio engraving.
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