The natural materials used to make the frames are enamel, special wood and animal heads. Generally, wooden frames and horn brackets are rare, and common glasses frames are common.
1. Truss: It is a spectacle frame made of clam shells produced in the tropical sea. It is mainly produced in the West Indies. The advantages are light weight, beautiful luster, easy processing and polishing, plasticity when heated, bonding when heated and pressurized, no irritation to the skin, and durability and preservation value. It is a high-end product in all kinds of glasses frames, and is very popular among male wearers of middle age and above. The disadvantage is that it is easy to break compared with materials such as celluloid, but it can be bonded and repaired after breaking. In the display of the counter, water should be placed to prevent drying. When using the maintenance, it should not be ultrasonically cleaned, otherwise it will be white and tarnished. Because cockroaches are animals that are forbidden to be captured in the ocean, they are not expensive and expensive.
2. Horn frame: The frame with the horn as the frame material is not common until the beginning of the 21st century.