Copper is a ductile red-brown corrosion-resistant metallic element. It is widely used as a thermal and electrical conductor. It is also widely used in cookware.

You must exercise care when cleaning copper because often items are only plated with a very thin layer. If the surface has been lacquered, use a cloth or sponge with a mild detergent.

If you're trying to clean copper cookware, try Bar Keepers Friend. Use it with a damp cloth (not a scouring pad!) and you will likely be impressed with the results. Keep in mind that using any type of abraisive could damage the patina of your copper.