Autogravure

Autogravure, a peculiar process of photo-engraving patented by J. R. Sawyer, London, on November 12, 1884. If an ordinary autotype carbon print be placed on silvered copper instead of on paper, the slight relief which the picture possesses is enough to admit of an Electrotpe (q. v.) being taken from it. The raised parts of the print become the depressed parts in the electrotpe. The latter can therefore be used for taking impressions from in the same way as an engraved copperplate. See PHOTOGRAPHY, AUTOTYPE.