In addition to a certain degree of water resistance, the color ink printed on custom square tin box tinplate also needs to have its special requirements.
Since the tinplate surface of the custom square tin box is impermeable to moisture and solvent, it needs to be baked and dried, so the ink should be heat-curable.

The custom square tin box has high requirements on the tinting strength and durability of the pigment. In addition to the basic properties of general offset printing ink, iron printing ink should also have the characteristics of heat resistance, strong ink film adhesion, impact resistance, good hardness, cooking resistance, and light resistance according to the characteristics of iron printing.
 Printing standard for the custom square tin box. The main parts reflect the main body's pattern, text, mark, and barcode position. Slight scratches: The printing surface is not more than 0.3mm*20mm, and no iron scratches are exposed. Main view: place the front of the product image and text directly in front of and under the sunlight, and the outer surface that can be observed.
Through the above introduction and analysis of the Custom square tin box requirements for color ink, hope it helps you.