Mainly considering the chemical stability of glass, the chemical properties of glass include water resistance, acid resistance and alkali resistance. If you make a teapot, you should mainly consider water resistance. Secondly, you should consider the heat resistance of glass and whether it can withstand high temperature. The water resistance of soda-lime glass is Grade III, and the heat resistance cannot exceed 100. Tempered glass mainly improves the strength of glass, but its chemical properties have little change, while borosilicate glass has a chemical stability of Grade I, which can withstand the high temperature of about 200.