According to the lithographic plate making method can be divided into protein plate, polyvinyl alcohol flat gravure, multilayer metal flat gravure, diazo resin photosensitive plate
Folded protein plate
Protein version, dedicated to negative plate, is based on zinc plate, ammonium dichromate and protein (mainly poultry eggs) as photosensitive film. For instant coated plate, can not be stored.
Folding polyvinyl alcohol flat gravure
Pva flat gravure, specially used for positive plate making, with zinc plate or aluminum plate as the plate base, ammonium diplexate and pva as the photosensitive film. For instant coated plate, can not be stored.
Folding multilayer metal flat gravure
Multi-layer metal flat gravure, by the oil wet copper as the base of the text and text part, and by the hydrophilic chromium or nickel as the basis of the blank part, to copper or aluminum plate as the plate base, after copper plating on chromium or nickel, and then by the Yang plate plate method made of printing. For instant coated plate, can not be stored.
Folded diazo resin plate
Diazo resin photosensitive version (also known as PS version), is the synthesis of diazo salt and phenolic resin photosensitive solution, coating on the electrolysis and anodized aluminum plate and made, can be stored for six months to a year, used in the positive plate making, can be made that the coating type photosensitive version and can be made into a prefabricated photosensitive version.
The bottom plate of common dyeing or pressing the outline of the screen is usually made into a tearing film plate (plate), which is coated with a light blocking layer or photosensitive layer, can be carved and peel or photosensitive peel off the special printing plate or film, the separate coating through tearing film, used for making map common dyeing mask.