Glass is recognized as the healthiest drinking vessel, although all are made of glass, but there are differences, know which kinds of common glass material is divided into?
1. Sodium-calcium glass water cup is also the most common glass water cup in our life. Its important components are silicon dioxide and sodium oxide, calcium oxide. This kind of cup through the mechanism and artificial blowing, the price is low, daily necessities. If sodium-calcium glassware is used as a hot drink, it usually needs to be tempered at the factory, otherwise the glass will crack if the temperature is too high.
2. High borosilicate glass, named for its high content of boron oxide. Tea sets and teapots commonly used for making tea can withstand large temperature changes without breaking. But this kind of glass looks thin, weight is light, feel poor.
3. Crystal glass water cup, this glass belongs to the high-end products in glass, because of the metal elements, his refraction and permeability is very close to natural crystal, and called crystal glass. Crystal glass is divided into two kinds, lead crystal glass and lead-free crystal glass. Lead-free crystals do not contain lead and are harmless to the body.
