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The offset press used for tinplate printing is different from ordinary paper printing equipment, and the equipment itself is highly customized. Because the metal material is harder, the equipment must have a higher pressure control ability during the printing process to ensure that the ink can be evenly transferred to the tinplate surface.

The composition of tinplate printing ink is similar to ordinary ink. It is mainly composed of pigments, binders, fillers and auxiliary agents. However, because the surface of tinplate is smooth and its absorption is poor, it must be different from ordinary offset printing inks. In addition to the printing ability of general offset printing inks, tinplate printing inks also have properties such as impact resistance, strong adhesion, heat resistance, light resistance, and cooking resistance.

Coatings are mainly composed of film-forming substances, pigments, driers, auxiliaries, solvents, etc., and can be divided into three types of coatings: inner coating, outer coating and varnish from the coating method and function. It protects the ink layer and increases the brightness of the image to make the product have a good metallic color. At the same time, coatings such as food cans can effectively prevent the contents from being chemically and biologically contaminated, reduce the possibility of leaking the cans, protect the original flavor and color of food, extend the storage time, and make the contents easy to pour out of the containers.