Electrography

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As electrography is called etching galvanically to produce zinc printing plates for printing on the printing press .

Electrography was first practiced by Böttger; Devincenzi, however, invented a simpler process in which the grained zinc plate, after it has been treated in a similar way to the lithographic stone, is applied the drawing with fat lithographic chalk or ink, which is then treated with gum water, painted over with turpentine oil and with grease Rolled in varnish in order to finally etch it in a copper solution, connected to a copper plate of the same size.