Printing types, printing machines can be divided into the following four types of letterpress printing machines according to the type of printing plates used. Letterpress printing is a printing method that uses letterpress plates to print. Letterpress printing machines are machines that use letterpress plates to complete the printing process. Gravure printing press. Gravure printing is a printing method that uses gravure printing. A gravure printing machine is a machine that uses gravure plates for printing. Lithographic printing press. Lithography is a printing method that uses a flat plate to print. A lithographic press is a machine that uses a flat plate to complete the printing process. The lithographic plate mentioned here refers to a printing plate in which the picture and text part and the blank part are almost on the same plane, such as a plano-gravure plate. Screen printing machine. Screen printing is a type of stencil printing. Hole printing refers to a printing method in which the graphics and text of the printing plate can be printed on the substrate through ink. Offset printing, also known as offset printing, is a type of offset printing that can clearly restore the color, contrast and layer of the original with high precision. It is currently the most common paper printing method. Suitable for posters, brochures, manuals, newspapers, packaging, books, magazines, calendars and other related color printed matter. Letterpress printing, a type of letterpress printing technology, is generally used when there is a lot of text, few photos and pictures, a high chance of changing the text, and a small number of prints. Suitable for small batch tasks such as printing invitation cards, business cards, labels and small packaging boxes. Traditional sequential number printing and small trademark overprinting are performed using letterpress methods. Screen printing, as a kind of printing with a wide range of applications, can be divided into fabric printing, plastic printing, metal printing, ceramic printing, glass printing, electronic product printing, lottery screen printing, and electronic decoration according to the different printing materials. Advertising board screen printing, metal advertising board screen printing, stainless steel product screen printing, light reflector screen printing, screen transfer anodized aluminum, screen printing and lacquer screen printing, etc. One of the stencil printing techniques, the printing ink is particularly thick and is best suited for producing prints with special effects. It is especially suitable if the quantity is not large and the ink color requires concentration. It can also be printed on three-dimensional surfaces, such as square boxes, boxes, round bottles, cans, etc. In addition to paper, it can also be printed cloth, plastic fabrics, plywood, film, metal sheets, glass, etc. Common new products include banners, pennants, T-shirts, corrugated cartons, soda bottles and circuit boards, etc. The flexibility of screen printing is unmatched by other printing methods.