Packaging printing, as a common packaging product in people's daily life, has different materials and printing types. Each printing material and type has its own characteristics. So what types are there? Changsha Packaging and Printing Factory takes paper products as an example to answer the types of paper packaging and printing.
The most common way to divide printing methods into relief printing, gravure printing, lithographic printing and orifice printing. Gravure printing plate part of the text raised, printing principle is similar to seal, board printing, gravure printing and relief printing on the contrary, the print part is lower than the blank part. In lithographic printing, the graphic part and blank part of the plate are almost on the same plane, using the principle of oil-water incompatibility to print. Orifice plate printing is the hole of the graphic part of the plate. Ink is transferred to the surface of the substrate through the hole. The common orifice plate printing is hollow plate and screen plate.
Gravure printing, relief printing and screen printing are mainly direct printing. Most of Changsha Packaging Printing Factory are direct printing. Direct printing and indirect printing are distinguished by whether the printing plate contacts with the printer or not. A large number of package box printing and picture album printing are direct printing. Indirect printing is the printing method of transferring ink from the printer to the printer through rubber cloth. Direct printing also needs to use pre-printed plate to print on the substrate, a small amount of packaging printing, album customization, etc. can be directly printed on the substrate through a computer-driven print head (or print head), such as digital printing.
Printing can also be divided into monochrome printing and colour printing according to the number of colours. Monochrome printing is mostly used in notebook printing and Book printing. Colour printing is multi-colour printing. On the basis of the original colour separation plate, the original colour plate is reprinted on the same printed material by using the mixture of pigments and subtraction. The CMYK four-colour printing commonly referred to by Changsha Packaging Printing Factory mainly adopts this printing method. Some packaging manufacturers will adopt four colors plus one or more spot colors to ensure that users can meet the requirements of color.