Clean coins in an ultrasonic device – gently and effectively
Whether old memorabilia, valuable collector coins, or rare anniversary coins – coins are fascinating and tell stories. But over time, dust, dirt, fingerprints, and even traces of oxidation build up on their surfaces. The challenge: coins are delicate, and improper cleaning can diminish their value. However, an ultrasonic cleaner can clean them gently and thoroughly – provided you follow a few important rules.
Why ultrasound for coins?
Ultrasonic devices generate high-frequency sound waves that create tiny cavitation bubbles in the liquid. These implode and loosen dirt from even the finest grooves and engravings. Combined with a suitable cleaning concentrate like EM-100, they not only remove deposits but also gently reduce traces of oxidation – restoring coins to their former glory.
Coin before cleaning with ultrasound
What collectors should pay attention to
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Do not clean all coins: Valuable collector coins, polished plates, or pieces with a special patina should not be cleaned in an ultrasonic bath, as their collector value may decrease.
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Choose the right concentrate: Aggressive agents attack the alloy. EM-100 was developed specifically for coins and protects the material.
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Keep cleaning time short: The shorter the better. Coins should only remain in the bath for a few minutes.
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Clean individually: Avoid placing several coins on top of each other – this would result in scratches.
Step-by-step instructions: Cleaning coins with ultrasound
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Preparation: Carefully remove any coarse dust or dirt with a soft cloth.
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Filling the device: Fill the ultrasound device with distilled water and add a few drops of EM-100.
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Cleaning: Place the coin one at a time in the basket and turn on the cleaner for a few minutes.
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Follow-up: Rinse the coin immediately afterwards with clear, lime-free water.
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Drying: Gently pat the coin dry or let it air dry – never rub or polish.
Advantages of ultrasonic cleaning for coins
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Gentle: No scratches, no rubbing, no loss of material.
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Thorough: Also removes deposits in engravings and recesses.
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Efficient: Cleaning in just a few minutes.
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Safe: With a suitable concentrate such as EM-100, the coin alloy is not attacked.
Conclusion
Ultrasonic coin cleaning is an effective way to restore the shine of collectibles and antique pieces. With the right cleaning concentrate, short cleaning times, and careful aftercare, dirt and deposits can be gently removed. By paying attention to the specific characteristics of your coins, you can restore their shine – without risking a reduction in value.
