In 2002, on the basis of the S-830 surface silica sol, huihe company improved the stability and stability of the coating, and introduced the S-830A surface silica sol suitable for golf ball casting. The physical and chemical indexes and performance have reached the level of imported silica sol, and some Hong Kong and taiwan-funded golf foundry has been used in large quantities. In view of the long-standing defects in the Chinese foundry industry, such as lack of surface and back silica sol, insufficient casting Surface finish, more out-of-place or unclear fonts, poor coating performance and short life of face paste, etc. , based on the analysis and research of S-M-30 silica sol of dupont company and 830 silica sol of Taiwan, huihe company first successfully developed 830 silica sol for surface layer in 1999, it is characterized by smaller particle size, higher strength, has been in most of Guangdong hardware foundry in place of imported 830 silica sol