Copper is a general term for daily necessities and industrial products that are processed from pure copper or copper alloy as the main raw material. Can be made into various shapes including rods, wires, plates, ribbons, strips, tubes, foils, etc. The processing of copper materials includes rolling, extruding and drawing methods. Among the copper materials, plates and bars are hot-rolled and cold-rolled; strips and foils are cold-rolled; pipes and bars are divided into For extruded products and drawn products; wire rods are all drawn. Copper is a tough, soft, malleable purple-red and shiny metal. One gram of copper can be drawn into a 3,000-meter-long filament, or pressed into an almost transparent copper foil of more than 10 square meters. Pure copper has high electrical and thermal conductivity, second only to silver, but copper is much cheaper than silver.