Principle of tinplate printing:
Tinplate printing also uses the physical properties of water and ink to repel each other. With the help of printing pressure, the printing plate graphics and text are transferred to the tinplate via a blanket, which belongs to the principle of offset printing. Because tinplate has special physical and chemical properties and reprocessing properties of printed matter, its printing process is quite different from ordinary offset printing.
The ink is required to have good adhesion and mechanical properties.
Since tinplate printed matter will eventually be made into food cans, toys, metal photo frames, and barrels and cans of chemical products, it needs to be cut, bent and stretched. Therefore, printing inks are required to have good adhesion to tinplate and corresponding machinery. performance. In order to improve the ink adhesion, the tinplate needs to be white painted before printing. White is the base color of all pictures, with high brightness. After adding other high-energy hues, the brightness of each hue can be increased to form a color gradation.