How to clean tarnished copper

In a large pot, mix one cup of vinegar, one tablespoon of salt, and four or five cups of water. Place the entire copper object into the pot, then bring the water to a boil. Leave it boiling until you begin to see the tarnish falling away from the copper.

Lemon Juice + Salt

Create a paste with lemon juice (lime or orange juice works, too) and salt at a 3:1 ratio, respectively. Make sure salt is dissolved so as not to scratch the copper. Rub a small amount of paste on the soiled copper object with a clean cloth until you start to see the grime loosen up.

Wipe the copper dry and clean and polish it after using it or touching it, and do not place it in a dishwasher under any circumstance. Additionally, you can coat your copper object by wiping it with a light coat of baby oil, mineral oil, olive oil, WD–40, or even a thin layer of carnauba wax or beeswax.

“If you have a large copper item and you want to clean it quickly, you can boil three cups of water, add a cup of vinegar and one tablespoon or more of salt,” says Reichert. Next, you would stir until the salt is dissolved and then place the copper item in the water. “The tarnish will come right off.”

Copper oxide dissolves in water, but it usually takes a long time. The combination of vinegar (a weak solution of acetic acid), and table salt (sodium chloride) helps to dissolve the copper oxide, and also forms the blue copper(II) ion, which is soluble in water. The penny becomes shiny again!

Things You‘ll Need

Restore dull copper with a dab of toothpaste. After you soak copper in water to remove loose debris, you can clean it with toothpaste and a toothbrush. This restores some of the copper’s luster and leaves behind its natural patina.

Vinegar and Salt

Rub a mixture of 1 tablespoon of table salt and 1 cup of white vinegar onto the copper with a soft cloth and rinse. Or, immerse the tarnished copper into a pot of 3 cups of water and the salt-vinegar mixture, bring to a boil and boil until the grime and tarnish comes off.

Don’t use toothpaste – Toothpaste is extremely abrasive. It can make your coins appear shiny, but cause significant damage to the surface. But like other things on this list, it can eat away at the coin’s patina and wreck its value.

Just be sure to rinse off the vinegar with water after you’ve soaked them, since any remaining vinegar residue could cause the coins to oxidize again. First, if you think your coins might be of any value, do not clean them at all, since you can possibly damage them by soaking in cleaners like vinegar.

Copper oxide dissolves in a mixture of weak acid and table salt-and vinegar is an acid. You could also clean your pennies with salt and lemon juice or orange juice, because those juices are acids, too.

Coke and off-brand colas will quickly remove the tarnish. Just don’t drink the coke afterward. Coke contains phosphoric acid that cleans the oxides. Try a variety of citrus juices to see which works best or simply let your pennies soak in lemon juice.

Soap. Cleaning your old coins with gentle dish soap and water can loosen some of that built-up dirt. Fill a small plastic container with warm water, add a few drops of mild soap, immerse the coins, and rub with your fingers or a soft toothbrush to clean.

Most wheat cents (wheat pennies were minted between 1909 and 1956) are worth about 4 to 5 cents. Those in better condition can have double-digit value. Special examples (especially those in near perfect condition) can be worth much more. And pennies dated from 1879 to 1909 are worth at least $1.

2- Use Dish Soap

This makes it the perfect formula for cleaning dirty coins. Let the coins sit in the soapy water for five to ten minutes and let the dish soap do its job, weakening the attachment between the dirt and your coins. Once the dirt and grime is loose, rub the coins in your fingers to help remove the dirt.

Vinegar (or Lemon Juice) and Salt

This method is the best way to clean your pennies, and it will produce a very bright orangey-copper color on your pennies. It does this by using the low levels of acids that are contained naturally in vinegar and lemon juice to remove the patina (brown oxidation) on the penny.

Vinegar & Salt

Mix up a concoction of vinegar and salt. Stir it around to dissolve the salt and then dump in your dirty pennies. Mix it up a bit and let it sit for several minutes. You will be able to see the cleaning process in action.