1. Strictly speaking, their raw materials are basically the same, but the difference lies in the production process. The production process of injection molded glasses is injection molding. The mold is first produced, and then the plastic is melted and injected into the mold to form a spectacle frame. It is a sheet of plastic formed by a pressing process, and then cut by a professional numerical control machine (CNC) to form a spectacle frame. The density is higher than that of injection molded spectacles, so it is heavier and more durable. It is not easy to deform after wearing, so the price is also Will be relatively expensive for injection molding.
2. The materials of injection-molded glasses are relatively cheap, and few people wear them now, and the pattern style is also called dull, which is not suitable for young people who are pursuing fashion. Since sheet glasses are formed first, they can produce a variety of The pattern, fashion and beauty, is the best choice for many young people. The difference between sheet glasses and injection glasses, sheet glasses are not only light but also will not cause skin sensitivity, the materials used are environmentally friendly products, and they have no side effects on our skin. Worry at ease, the disadvantage is that it is not easy to heat and adjust.
3. Visually observe the compactness of the surface, whether there are bubbles, and whether the end of the temple (near the frame) is the perfusion surface or the cutting surface, whether there are obvious perfusion points on the frame frame and the temples (like plastic cups, etc.) The above kind of small protrusion with a diameter of 1-2mm).
Nowadays, many foreign trade glasses manufacturers will not make injection glasses anymore. The domestic market is relatively better. Many people in the domestic glasses are middle and low-end consumers, so injection glasses are also very marketable. Of course, they are still popular compared to sheet glasses. If it is not high enough, Yancheng glasses also recommends the use of sheet glasses for the optical glasses frame, which is more conducive to preventing myopia.