of thermal transfer are strong color, corrosion resistance, acid and alkali resistance, anti ultraviolet, rain resistance, water leaching, and air purification. The image is clear, the color is bright, and the color is never fading. It is a good thing for remembrance and collection. The principle of heat transfer is to print color patterns on the film of heat-resistant substrate in advance, and then cooperate with special transfer equipment to transfer printing to the surface of the product. The quality of hot transfer printing technology is reliable and stable, and the good material formula and equipment are closely matched. The characteristics of the heat transfer printing process are simple operation, less production process, high efficiency, no pollution, small land occupation and less investment. After printing, the adhesion is good, glossiness is high, the picture and text are clear, the color is accurate, the color is bright and safe and nontoxic, and after the stamping, it can be processed by injection of oil and sand, two injection molding, and bending and punching. 1, rich in printing