Copper is a soft, ductile metal with a warm pink hue and exceptional thermal and electrical conductivity. In electroplating, copper is often used as both a final finish and a base layer in multi-metal systems.

As an underplating, copper improves adhesion, enhances corrosion resistance, and creates a more compatible surface for subsequent layers such as nickel, tin, or silver. Its excellent conductivity also makes it valuable for improving electrical and thermal performance in critical applications.