To avoid the tarnishing of copper, lightly scrub your copper piece with fine steel wool (readily available at hardware stores) as needed. Rinse beneath lukewarm water and gently pat dry with a clean, dry cloth.
You can use regular kitchen items as well: swirl your piece in a dish of an acidic ingredient (like soy sauce, ketchup, vinegar, and lemon juice) for a minute or two. Remove piece and quickly rinse thoroughly under running water. Gently dry immediately with a clean, dry cloth.
You can also purchase copper jewellery polish, or treated polishing cloths.
Keeping Copper from Tarnishing
Try not to get your copper piece wet. Don’t wear your copper jewellery in the shower. Take care not to touch the copper too much if you have oils or lotion on your skin.
Store your copper in an airtight location (like a resealable plastic bag) when not in use.
A Note on Rings
Copper rings are wonderfully stylish and compliment any skin tone. However, they can react to sweat or lotion on the hands and turn your skin green. This is harmless and can be washed off.
You can minimize this reaction by applying a protective layer of clear nail polish along the inside of your ring.