Silver-plated copper is after silvering on the hypoxic oxygen-free copper wire or silver plating copper wire, wire pull through drawing machine made thread . Silver-plated copper into silver plating soft round copper and silver plating copper wire hard round. Silver plating soft round copper is annealed to change its physical characteristics, in order to achieve the purpose softened. Good silver plating copper coating is firmly attached to the surface of the conductor continuously, after the specimen sample surface the same black. Silvered coating surfaces should be smooth and continuous, no harmful defects silver particles, burrs, mechanical damage.