non-toxic, tasteless; transparent, beautiful, good barrier, airtight, rich and common raw materials, low price, and can be used repeatedly. It has the advantages of heat resistance, pressure resistance and cleaning resistance. It can be sterilized at high temperature and stored at low temperature.
Note: if it is cooled directly, it is likely to break during cooling or later storage, transportation and use. In order to eliminate the phenomenon of cold explosion, glass products must be annealed after forming. Annealing is to keep the temperature in a certain range or slowly cool down for a period of time to eliminate or reduce the thermal stress in the glass to the allowable value.