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This printing mode is divided into two kinds: 1. The carving of the concave - the image deep strong, ink concentration is very high, in the image part with micro convex and with a slightly concave phenomenon in the back. 2. Gravure or intaglio rotary, the ink layer is thin, stamped around some of the jagged, and sometimes tailing phenomenon, lines, it's hard to see the dot was fuzzy phenomenon.

This printing mode is divided into two kinds: 1. The carving of the concave - the image deep strong, ink concentration is very high, in the image part with micro convex and with a slightly concave phenomenon in the back. 2. Gravure or intaglio rotary, the ink layer is thin, stamped around some of the jagged, and sometimes tailing phenomenon, lines, it's hard to see the dot was fuzzy phenomenon.