Performance introduction: Aiming at the long-standing defects of Chinese foundry industry, such as indistinguishable surface and back silica sol, insufficient surface finish of castings, unclear font position, poor paste coating performance and short service life, Huihe took the lead in 1999 by analyzing and studying DuPont SM-30 silica sol and Taiwan 830 silica sol, based on a large number of experimental data. The special silica sol for 830 type surface layer has been sent out, which is characterized by smaller particle size and higher strength. It has replaced imported 830 silica sol in most hardware foundries in Guangdong Province.

In 2002, on the basis of S-830 surface layer silica sol, Huihe Company has greatly improved its coatability and stability, and introduced S-830A surface layer silica sol suitable for golf ball head casting. Physical and chemical indexes and performance have reached the level of imported silica sol, and have been used in large quantities in some Hong Kong-funded and Taiwan-funded golf foundries.