As is known, plastic packaging bags are generally printed on various plastic films, and then combined with a barrier layer and a heat sealing layer to form a composite film, which is slit and bagged to form a packaged product. Among them, printing is an indispensable key process in the production process of plastic packaging bags. So what are the printing methods for plastic bags?
1. Gravure printing
Gravure printing mainly prints plastic films for the manufacture of various plastic bags and the like.
2. Letterpress printing
Toppan printing is mainly for flexographic printing, which is widely used in various plastic bags, composite bags and plastic bags.
3. Screen printing
Screen printing is mainly used for plastic film printing and various containers that have been formed, and also for printing transfer materials for transferring graphics on special shaped containers.
4. Special printing
The special printing of plastic packaging bags refers to other printings different from the traditional printing methods, including inkjet printing, gold and silver ink printing, bar code printing, liquid crystal printing, magnetic printing, pearl printing, hot stamping anodized aluminum and the like.
The printing results of different printing methods are different. You can choose the appropriate printing method according to the actual situation.