Cooper coins can turn dull and discolored over time. This is because the copper reacts with oxygen in the air and forms copper oxide. This can cause copper coins to tarnish and turn green, brown or black. Copper coins can easily be cleaned so that they look shiny and new again.
To clean copper coins, you will need:
- 1/4 cup white vinegar
- 1 tsp. of table salt
- Small bowl (not metal)
- Paper towel
- Prepare your cleaning solution. You may need more or less of this mixture, depending on how many coins that you need to clean. In the small bowl, pour 1/4 cup of white vinegar. Stir in one tsp. table salt.
- Mix until the salt is fully dissolved. Use the spoon to stir the solution and to help the salt dissolve. This may take a minute or two.
- Place the copper coins into the solution. Drop the coins into the solution one by one. Leave the coins in the mixture for five to ten minutes, depending on how tarnished the coins are. Make sure that the coins are completely covered with the vinegar solution. The acetic acid in the vinegar dissolves the copper oxide on the surface of the coin.
- Remove the coins from the mixture. Use the spoon to remove the coins from the bowl. Rinse the coins with water to remove any remaining salt and vinegar.
- Place the coins on a paper towel to dry thoroughly. Your copper coins will be bright and shiny again and look as good as new.
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