Printing type, according to the different types of printing plates used, printing machines can be divided into the following four types of relief printing machines. Relief printing is a printing method using relief printing, and relief printing machine is a machine that uses relief printing to complete the printing process. Gravure printing machine. Gravure printing is a printing method using gravure printing. Gravure printing machine is a machine that uses gravure printing. Lithographic printing machine Lithography is a printing method using lithography. Lithographic printing machine is a machine that uses lithography to complete the printing process. Lithography here refers to a printing plate in which the graphic part and the blank part are almost in the same plane, such as intaglio. Screen printing machine. Screen printing is a kind of stencil printing. Hole printing refers to the printing method that the graphic part of the printing plate can be missed to the substrate through ink. Offset printing, also known as offset printing, is a kind of lithographic printing, which can clearly restore the color, contrast and level of the manuscript with high precision and is the most commonly used paper printing method at present. Suitable for posters, brochures, brochures, newspapers, packaging, books, magazines, calendars and other related color printed matter. Letterpress printing, a kind of letterpress printing technology, is generally used when there are more words, fewer photos, more opportunities for changing words and less printing. Suitable for printing invitations, business cards, labels, small boxes and other small batch tasks. Traditional serial number printing and small trademark overprinter are all carried out by relief printing. As a widely used printing, screen printing can be divided into fabric printing, plastic printing, metal printing, ceramic printing, glass printing, electronic product printing, lottery screen printing, electronic decorative billboard screen printing, metal billboard screen printing, stainless steel finished screen printing, reflective screen printing, screen transfer anodizing, screen printing printed matter and lacquer screen printing. As one of stencil printing technologies, printing ink is particularly thick, which is most suitable for making special-effect printed matter. It is especially suitable for small quantities and ink colors need to be concentrated. It can also be printed on solid surfaces, such as square boxes, boxes, round bottles and cans. Besides paper, you can also print cloth, plastic fabric, plywood, film, metal sheet, glass and so on. Common new products include banners, pennants, T-shirts, corrugated boxes, soda bottles and circuit boards. The flexibility of screen printing is incomparable to other printing methods.