High borosilicate glass is on the basis of ordinary glass, adding 12.5~13.5% boron, in the manufacturing process, also add the glaze water glass sand, soda water and lime, the strain temperature can reach 520℃, the strength is also higher. There is also a lower coefficient of thermal expansion: (3.3 0.1) ×10-6/K, only about 1/3 of ordinary glass, 3.3 high borosilicate glass is called this. It is also the best high borosilicate glass. High borosilicate glass is more heat resistant, can withstand the instantaneous temperature difference of up to 150 ° C, ordinary glass can only withstand 75 ° C. Just boiled water is 100 ° C, if you are not in an extremely cold area, 150 ° C temperature difference, how toss can not be cracked. But ordinary glass is not good, a little cold pour into boiling water will crack

The performance of glass is particularly stable, whether it is ordinary glass or high borosilicate glass, ordinary drinking water is not what harmful substances precipitation

You must know that when you enter the laboratory in chemistry class, you find that almost all chemical reagents are packed in various glass tubes and bottles. If it is chemically unstable, it cannot be widely used.