From the Copper Collection. Viking 3-Ply Hammered Copper Cookware delivers superior performance in cooking with a beautiful, copper exterior finish. Because copper is highly conductive, cooking can be more precise due to a lower amount of heat needed to make that masterpiece dish. Enjoy the change in colour from the rich patina that develops over time from multiple uses, which doesn't affect the pan's performance whatsoever. Or maintain the original finish using a copper polish like PennyBrite by EZ Brite or mixing salt and lemon. Copper. Hand wash. Imported.