This engraving technique is achieved through the preparing of the copper plate with a rocker (or berceau) by granulating the metal in every direction, until the metal is entirely granulated, in a way that if it were stamped it would come out entirely black.


With the help of a burnisher and an agate stone, the metal is flattened to achieve the desired chiaroscuro, with a variety of greys and, the completely flattened parts, white. Since the granulated surface is not too deep, this technique only allows for small number of copies.

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