1. In tinplate printing, due to the non-absorbability of the substrate and the tinplate plate has a certain hardness, the deformation of the dots during the printing process is more obvious than that of paper, especially in the dark and midtone areas, due to the deformation of the dots, the midtones The level jump becomes deeper, the dark tone changes sharply and upgrades, the use of square dots is more obvious, while diamond dots or round dots, the sudden change of midtones is alleviated. Therefore, the printing iron plate-making dots choose round dots or diamond dots. It is more advantageous to reproduce the dot reproduction of the printing iron.
2. After the tinplate is printed, it needs to be stamped and formed. Therefore, in the process of tinplate printing and plate making, it is necessary to reserve space such as weld edges to ensure that the text pattern does not deviate from the center after processing and stamping.
3. All welded finished products, such as the seam of the printing plate of the aerosol can, cannot have graphics, etc., to ensure the need for subsequent welding.