First, the function of the film is to improve the folding resistance of the packaging, protect the color of the packaging surface, and improve the waterproof and antifouling capabilities of the packaging surface. Many general gift boxes are custom made of coated paper or white cardboard and grey board, many of which are made of special paper.

What is a spot color and what are four colors: a spot color refers to a specific color. When a spot color is printed, it is not a color synthesized by printing C, M, Y, and K four colors, but a special color. Specific inks to print colors. Spot color inks are pre-mixed by the printing house or produced by the ink house. For each spot color of printed matter, there is a special color plate corresponding to it when printing. Use spot colors to make colors more accurate. Such as: special gold, special silver, etc. Four colors refer to the printing colors in CMYK mode.