What are the materials of glasses

 Tortoiseshell Glasses are mainly made of the following materials: 1. Light Tortoise Shell Glasses lenses are characterized by high definition and high hardness. Their disadvantages are easy to break and heavy. 2, PC lens is polycarbonate, is thermoplastic material, the advantage is relatively light, but also relatively safe, suitable for rimless Tortoise Shell Glasses. The disadvantage is that processing is more difficult, the surface is easy to scratch, thermal stability is not very good. Generally applicable to the production of sunglasses, that is, flat lens Women's Prescription Sunglasses. 3. Resin lenses are most commonly used at present and are of high quality. The advantage is relatively light, impact resistance, not easy to break, at the same time the uv absorption is better than the glass lens, but also can add anti-uv elements. The disadvantage is not wear-resistant, easy to scratch. 4, natural lenses are now used less, such as the advantage of quartz production is large hardness, wear resistance, the disadvantage is that can not fully absorb ultraviolet and infrared. If you match glasses, it is better to use resin lenses, which are also widely used materials at present.