Tin Box Packaging Tin Box Christmas Custom

For example, the internal coating of metal containers are made of food cans which are in direct contact with food. It is required to be non-toxic, tasteless, and can not react with the contents. After internal coating, it should be dried in a dryer.External coating (priming) refers to coating or printing a layer of white ink on the outside of the iron sheet, i.e. the printing surface, to cover the areas that do not need metal luster, so as to make the color printed on the white more bright.In addition, the polar groups of white ink can be used to increase the adsorption capacity of its surface. The roller coating method and printing method can be used for priming. The roller coating method can make the white ink thicker than the printing method. The softness and adhesion fastness of the externally coated white ink film shall be good, so as to be suitable for the stamping process in the later process. The gloss shall be excellent, and the color change (yellow) shall not be allowed after baking at high temperature. Print after priming and drying.