Plastic inks generally vary according to the speed of the printing press, the characteristics of the material being printed, and the process used. For example, plastic lead printing and plastic flexographic printing are both embossing, but the former has a slow printing speed and requires oxidized conjunctival ink, while the latter has a fast printing speed and requires volatile drying ink, and must not be used interchangeably. For another example, plastic flexographic printing and plastic gravure printing are both rotary printing, with similar printing speeds, and both use volatile ink. However, the former is a resin plate, and it is necessary to consider whether the solvent in the ink has a corrosive effect on the printing plate. While the latter is a metal plate, there is no need to consider the influence of the solvent on the printing plate. In addition, polyethylene, polypropylene, polym, cellophane, etc. in common packaging materials are all transparent plastic films, but their printability is not all the same, and corresponding inks are also required.