Spectacle frame is what material?

Main ingredients: natural material tortoise shell, wood, horn, ivory, etc. Features: natural environmental protection, small stimulation to the skin, have health care function, the price is expensive. The market is relatively rare. Main material: metal alloy of copper and copper alloy, aluminum alloy, stainless steel, monel alloy, nickel alloy, pure titanium and titanium alloy and pure gold, platinum, etc. Characteristics: strong and light. Inferior metal alloy frame can produce stimulation to the skin, different metal material price are different. Plastic plate main materials: plastic board materials. Features: plastic frame light weight, not easy to damage, affordable. More style, is popular with young people. Memory material main material: contains strong resilience of metal and nonmetal materials. Features: light quality, super elasticity, big bend. Suitable for frequent business trips, the job is busy, often people use picking and random glasses.
related: frame frame material