Plastic Or Resin
Generally used to make glasses of non-metal material mainly used as raw material for synthetic resin, is divided into two categories of thermoplastic and thermosetting resin.
Is a kind of material used to make glasses very early, early 21st century have been rare, celluloid and good plasticity, hardness, can be dyed a variety of colors, the disadvantage is poor stability, corrosion aging will be issued by the friction smell of camphor can be used to identify the material. Due to aging and vulnerable characteristics such as burns, have been rarely used.
2, acetate fibers
Compare with celluloid, acetate is not flammable. General Chemistry for this material, in accordance with the process, and can be divided into injection molding and sheet metal.
3, plastic injection molding
Low cost seams, rough, sunglasses cheap (thermal processing).
4, plate rack
Cold manufacture, fine, good quality, durable, most of the non-metallic carbon Crystal frame is made of sheet materials processing: is characterized by high intensity, strong, but more brittle material in the winter after the impact of the collision, easily broken, way to distinguish carbon lattice are: leg significantly cutting marks.
5, epoxy resin
The proportion of light, color, and good flexibility, long life, first by the European glass company development of epoxy resin is mainly used for making CD, Dunhill and other brand-name frames. Distinguish between epoxy resin is leg-no core, and cellulose acetate has a metal core. Epoxy resin is bright in color.