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Referred to as gravure gravure printing, is one of the four major printing printing. Gravure printing is a direct printing method, it will be gravure pits contained in the ink directly imprint to the substrate, the printed picture gradation is determined by the size and depth of pits, if is higher than that of pit depth, the ink containing more, after imprinting substrate leave the ink layer is thicker; on the contrary if pits shallow, containing the amount of ink on the less, after imprinting substrate leave the ink layer is thin. Gravure printing plate surface is one by one with the original graphics pits and plate corresponding to the composition of the. At the time of printing, the ink is filled into the pit, the ink to the printing plate surface scraping knife scrape, plates and substrate between a certain contact pressure, pit the ink transferred to substrate, printing is completed.