Printing principle of metal packaging printing process:

The printing process of tin boxes (tin cans) utilizes the physical properties of water and ink repulsion, and with the help of printing pressure, the printing plate images and text are transferred onto the tin box through a rubber blanket, which belongs to the principle of offset printing. Due to the special physical and chemical properties of tinplate boxes and the reprocessing performance of printed materials, their printing process is significantly different from ordinary offset printing. After completing all color schemes, a layer of glossy oil should be applied to the surface of the printed tin can to increase the glossiness of the printed product and also improve the hardness of the product surface, making the printing ink layer flexible and corrosion-resistant. This can produce beautiful and eye-catching tin box printing packaging.