In daily life, we can often see a wide range of glasses in large shopping malls, with bright colors and full texture. We can also see some colorless and transparent water cups, but are the glass materials the same? What are the materials of the glass?
1. Sodium calcium glass water cup: it is a common glass water cup in our life. Its components are silica, sodium oxide and calcium oxide. This kind of water cup is made by mechanism and manual blowing. It is cheap and is a daily necessities. If sodium calcium glassware is used for drinking hot drinks, it usually needs to be tempered when leaving the factory, otherwise the temperature difference is too large, which may lead to cracking.
2. High borosilicate glass water cup: this kind of glass is named for its high content of boron oxide. It is commonly used with tea sets and teapots for making tea. It can withstand large temperature difference without cracking. This kind of glass looks very light and light.
3. Crystal glass water cup: this glass material is a high-end product of glass. It is called crystal glass because it contains more metal elements and its refractive index and permeability are close to natural crystal. Crystal glass is also divided into lead and lead-free. Crystal glass containing lead is not recommended for consumption. Long term use will lead to lead poisoning. Lead free glass can be used safely and is harmless to human body.