Lost wax casting enterprise generally choose zircon powder as the surface coating.When zircon powder oxide impurities, decomposition temperature drops, precipitation amorphous SiO2, react with certain elements in metal, make the casting surface produces "pitting" defects, such as casting surface quality.Moreover, zircon powder particle size and distribution of powder coating liquid than also has a direct impact.Therefore, the choice of the supplier should be strictly controlled.Lost wax casting material quality requirements including metal materials, die material and quality control of silica sol, etc.These are the lost wax casting quality requirements of some materials, only good quality can get produced more comprehensive product more well!