1, Crystal glass is called artificial crystal. Because natural crystal is rare and not easy to mine, it can not meet people’s needs, so artificial crystal glass is born. Because of its high transparency, it can be made into a variety of handicrafts.
2, Ordinary glass
Ordinary glass is a relatively transparent solid material that forms a continuous network structure upon melting, and gradually increases in viscosity during cooling and hardens and crystallizes silicate-based non-metallic materials. The composition of ordinary glass chemical oxides (Na2O·CaO·6SiO2), the main component is silica. Widely used in buildings, used to separate light from the wind, is a mixture. The float glass of the float glass and the grid glass is of good quality.
The difference between ordinary glass and crystal glass
Crystal glass and ordinary glass look very similar, but they are two completely different substances, mainly with the following differences:
1, the material is different
Crystal glass is a crystal of silica, and glass is only a molten state mixture containing silica.
2, different effects
The ordinary glass only has a decorative effect, and the crystal glass has a piezoelectric effect in addition to the decorative effect, and has a special health effect.
3, the price is different
The unit price of crystal is glass several times or even several times higher than ordinary glass.
4, different physical properties
(1) Crystal glass is a crystal with a high hardness (Mohs grade 7), while the hardness of the ordinary glass is low (Mohs 5.5), crystal can mark on the glass, and vice versa.
(2) Crystal glass is a crystal body with good thermal conductivity, and it feels cold with the tip of the tongue. The ordinary glass is warm.
(3) Distinguish by polarizing mirror, crystal glass can transmit light, but ordinary glass can’t.
At the time of purchase, we can easily distinguish them based on the different physical properties of crystal glass and ordinary glass.
5, different processing techniques
The glass can be hot-casted, saving labor and labor. Crystal glass is a crystal, which cannot be reversed after heating and melting, so it cannot be cast by hot casting, and only cold working such as cutting or grinding can be used. It costs a lot of money and costs. The crystal glass has high hardness and is not easy to wear. The ordinary glass has a low hardness and is easy to rub. The crystal glass has good stability and will not change color when used for a long time. The ordinary glass is easy to yellow.
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