Packaging printing is based on the printing of various packaging materials. Decorative patterns, patterns or words are printed on the packaging to make the product more attractive or illustrative, thus playing a role in conveying information and increasing sales.Including packaging carton, packaging bottle, packaging can printing.Packaging printing occupies a large proportion in both printing industry and packaging industry, and is an indispensable part of packaging engineering.There are letterpress printing, plate printing, gravure printing, screen printing, orifice printing and other printing methods.The main elements of printing are paper, ink, color and so on.Packaging printing needs to take into account the economy, environmental protection and other issues, and at the same time need to be able to complete, good expression of the information that needs to be printed.