Spectacle frame material type - Metal frame

- Feb 02, 2019-

metal sunglass

The metal frame is made of single metal or alloy material, which is sturdy, beautiful and lightweight. The materials used in metal frames are required to have a certain hardness, elasticity, softness, wear resistance and corrosion resistance. The metal materials used for the frames are mainly precious metals, nickel alloys, copper alloys and titanium alloys.