Gravure printing, referred to as gravure printing, is one of the four printing methods. Gravure printing is a direct printing method, which directly imprints the ink contained in the gravure pits onto the substrate. The shade level of the printed picture is determined by the size and depth of the pits. , the ink contains more ink, and the ink layer left on the substrate after embossing is thicker; on the contrary, if the pits are shallow, the amount of ink contained is less, and the ink layer left on the substrate after embossing thinner. The printing plate of gravure printing is composed of pits and the surface of the printing plate corresponding to the original text. During printing, the ink is filled into the pits, the ink on the surface of the printing plate is scraped off with a squeegee, the printing plate is in contact with the substrate under a certain pressure, and the ink in the pits is transferred to the substrate to complete the printing.
As a kind of printing process, gravure printing has the advantages of thick ink layer, bright color, high saturation, high printing plate durability, stable printing quality and fast printing speed in the field of printing, packaging and graphic publishing. occupy a very important position. From the application point of view, in foreign countries, gravure printing is mainly used for fine publications such as magazines and product catalogues, packaging printing and printing of banknotes, stamps and other securities, and also used in special fields such as decorative materials; Printing is mainly used for flexible packaging printing. With the development of domestic gravure printing technology, it has also been widely used in paper packaging, wood grain decoration, leather materials, and pharmaceutical packaging.