Profile: Macro Developments (Portsmouth) Ltd. specializes in providing plating service to the local electronic and light engineering industries. Our services include hard anodizing, black nickel, electroless nickel, chromating, tin plating, zinc plating, copper plating, and silver plating services. Hard anodizing is an electrolytic process used to increase the thickness of the natural oxide film on the surface of aluminum and its alloys, and produces a very hard corrosion resistant insulated surface.