Removing Tarnish or Oxidization From Metal
If you have oxidized copper or silver jewelry, you can remove all or some of the oxidization. Remember that oxidization is a natural process, and while you can slow the process, it's difficult to eliminate it completely.
A quick and easy way to remove tarnish is to use a solution of vinegar and salt. I use about 1/4 cup vinegar to 1 teaspoon salt, mixing it together in a shallow plastic dish. If you have larger pieces to clean, just mix more in the same ratio. Dip the jewelry in the solution, rinse well under running water, and dry. You can let the jewelry sit in the solution for a short time, but be sure to rinse it well. Copper that is not rinsed really well will develop a green-blue verdigris finish (much like copper that's left outside for an extended period of time) that may rub off on your skin or clothing.
Lemon juice can also be used in the same manner for both copper and silver. Again, be sure you rinse the item thoroughly after cleaning!
Commercial liquid tarnish removers, such as Tarnex, can also be used to clean jewelry. These work well for jewelry that you want to keep sparkling, but has many recesses or swirls. Follow label directions, and never use on jewelry that contains porous stones, such as opals, pearls or turquoise. If you're in doubt on a stone or bead, test it in an inconspicuous spot first!
Paste tarnish removers work well too. I like to use a natural tarnish remover from Sunshine Products for cleaning jewelry that I've artificially oxidized with eggs, Liver of Sulfur, or heated in the oven. The paste allows you to get the exposed surfaces nice and shiny, while leaving a great dark finish on the recessed areas. As with the liquid cleaners, be sure you test stones or beads first.
