With the development of science and technology and the improvement of the quality of life, the people's requirements for glass bottle packaging products are getting higher and higher, which also brings new challenges to the manufacture of glass bottles. Now many glass bottles are used to make molds. Spraying a layer of chromium (Cr) on the surface can increase the surface finish of the glass bottle mold by more than 30%, and increase the hardness and endurance, prolonging the service life of the mold. The produced glass bottles are particularly bright, especially in the production of large quantities. It is obvious that the quality of the product is improved. Although the cost of chrome-plated molds is higher than that of ordinary molds, this type of spray process is increasingly welcomed by many glass bottles.