How to Clean Antique Coins
Cleaning antique coins is a precision operation. Coins that are too dirty to decipher are often deemed unacceptable by collectors, but improperly cleaned coins can lose all of their value as well. The secret to cleaning coins is to first gather information, and then use caution and restraint.
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Things You'll Need
- Warm, soapy water
- Soft, dry cotton cloths
- Cotton swabs
- Petroleum jelly
- Olive oil
Instructions
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Know your coin. Most antique coins lose their value once they're cleaned. Make sure you know what degree of cleaning, if any, is acceptable for your particular coin. Also be aware of its metal content, as this will determine which cleaners are safe to use.
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If you decide you must clean your coin, begin by soaking it in warm, soapy water. This should loosen dirt and sediment without affecting the natural metals or preservation.
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Gently dry the coin with a clean, cotton cloth. Don't abrade the coin to the point of removing anything but visible dirt.
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To remove more sediment, gently swab the coin with petroleum jelly and a cotton swab. Remove with a clean swab.
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If sediment or corrosion still remains, try soaking the coin in olive oil overnight. This will loosen any non-native elements attached to the coin with minimal damage.
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If the coin is still unsatisfactory, consider having a professional coin cleaner do the job. Professional cleaners have access to many methods, such as electrolysis and "dripping," that clean more effectively than amateur methods.
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Tips & Warnings
If you aren't worried about preserving the monetary value of your coin, you may use harsher cleaners, such as vinegar, baking soda, and commercial coin-cleaning solutions that are supported by professional opinion.
Always use new, clean tools for each coin you're cleaning. Corroding metals can have adverse reactions on one another.
It's always best to consult a professional before attempting to clean coins. Value lost through cleaning can't be retrieved.
References
- Photo Credit Ancient silver and bronze coins image by filosof from Fotolia.com
