1, advantages
High refractive index, high light transmittance, improved mechanical reliability and chemical resistance, especially suitable for the production and refining of glass jewelry products, decorations and articles, including dendritic decorative lamps and semi-finished products.
2. Development direction
The development direction of crystal glass, in addition to developing lead-free crystal, on the one hand, should maintain tradition, and traditional technology may become a historical heritage; On the other hand, new technologies and new processes should be adopted. Some famous crystal glass enterprises in the world are developing along this road, not only making traditional hand-carved glass, but also using 3D laser automatic cutting and engraving machine to mass produce cut and ground crystal glass products. It not only produces lead crystal ornaments and handicrafts, but also produces high-tech products such as telescopes, high refractive microspheres and optical fibers.
Extended data
In 1972, EEC published the guiding principles in the form of 3 12/ 1972, stipulating that lead crystal glass can be divided into:
1, all-lead crystal contains PbO≥30%, density d≥3.0g/cm3 and refractive index nd ≥1.545;
2. Lead crystals contain PBO ≥ 24%;
3. The content of PbO in crystal glass is not clear, but it is pointed out that the glass with PbO 18% and d≥2.7 in German market can be called Pressble Crystal or BLEIKRISTALL GEPRESST.
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