Silver plating is easily polished, highly reflective ability, and good thermal conductivity, electrical conductivity, welding performance. The silver coating was first used in decoration. Generally accepted in the electronics industry, communications and instrumentation manufacturing silver-plated war resistance to the appearance of the phase-out of metal parts, metal welding skills. In addition, searchlights and other reflector metal mirror to be silver. Silver atoms tend to spread and slip along the material appearance, easy to produce in a humid atmosphere produce silver to be caused by a short circuit, and therefore the silver plating should not be use in the printed circuit board. Use silver plating solution is cyanide plating bath.