An alloy of copper and tin with a similar color to Nordic Standard copper finish. When exposed to the atmosphere, the surface will change gradually to a stable, dark chocolate brown or even black ...

The fusion of metals and the mode of mixing them in the crucible to form alloys ... of copper and 1 of zinc. Dutch metal is composed of 84.5 copper and 15.5 of zinc. It is of a pale yellow color ...

In a first, researchers have developed a new copper alloy that's one of the most resilient copper-based materials ever made.