An intaglio engraving made by hand or by mechanical means. Divided into 3 categories: 1, hand straight intaglio. The bottom trace or transfer in copper or steel plate with knife, carved needle, embossing roll by hand along the contour line drawing and direct carving graphics, lines on both sides of the debris removed, with scraper knife pressure and renovation. 2 etched intaglio plate. The plate is coated with the resist film, the steel needle sharp by hand carved on the film graphic dots and lines, exposing the metal surface, immersion liquid for a moment out in the corresponding small and thin film and corrosion at the idea. Such as repeated film corrosion, so that the graphics and text lines around the line due to corrosion time and reach the thickness of different requirements.

Gravure. With a mechanical engraving or corrosion resistant film. Draw on the material after the gravure. A pattern engraving machine, engraving machine, embossed parallel line engraving machine engraving machine and scaling etc.. Electronic engraving machine is directly on the metal surface by computer control roller carving knife, or with a laser beam engraved on the surface of the drum plastic layer.

This is the introduction of Gravure Engraving technology..