Unearthing History: Cleaning and Preserving Coins Found Through Metal Detecting
Cleaning and Preserving Coins Found While Metal Detecting
Metal detecting is an exciting hobby that allows enthusiasts to unearth hidden treasures from the past. One of the most common finds while metal detecting is coins, which can provide valuable insights into history and culture. However, once these coins are discovered, it’s important to know how to properly clean and preserve them to maintain their value and historical significance.
Cleaning Coins
Before attempting to clean any coin, it’s crucial to understand that cleaning can potentially damage or devalue the coin if done improperly. In many cases, leaving a coin in its found condition may be the best approach, especially for older or rare coins. However, for more common or heavily tarnished coins, gentle cleaning methods can be employed.
1. Assessing Coin Condition: The first step in deciding whether a coin should be cleaned is evaluating its current condition. If the dirt or grime on the surface is superficial and does not affect details or inscriptions significantly, it might be wise not to clean it at all. Cleaning should only be considered when necessary.
2. Washing with Mild Soap: For moderately dirty coins made of materials like copper or silver alloys (such as U.S quarters), washing with mild soap can suffice. Use lukewarm water and a small amount of dishwashing liquid free from additives like bleach or lemon extracts that could harm the coin’s surface.
Gently rub both sides of the coin with your fingers under running water while avoiding excessive force that could cause scratches. Rinse thoroughly after cleaning and pat dry using soft cotton fabric without rubbing vigorously.
3. Soaking in Distilled Water: Some old copper or bronze coins might have developed green corrosion known as verdigris over time due to exposure to moisture or chemicals in soil. To remove this corrosion safely:
Fill a container with distilled water (not tap water) at room temperature.
Submerge the affected coin fully into distilled water and let it soak for a few hours or overnight.
After soaking, gently brush the coin with a soft-bristled toothbrush to remove loosened corrosion.
Rinse the coin under running distilled water and pat dry.
4. Using Chemical Solutions: For coins heavily encrusted with dirt, rust, or corrosion that cannot be cleaned using the previous methods, chemical solutions specifically designed for numismatic cleaning can be used as a last resort. These solutions should only be used by experienced collectors who understand their potential risks.
Always follow the manufacturer’s instructions carefully when using any chemical solution. Commonly used products include diluted vinegar, acetone, or commercially available coin cleaning agents. However, these substances should be handled with caution due to their potential to damage certain types of coins.
Preserving Coins
Once your coins are clean and dry, it’s essential to store them properly to maintain their condition and prevent further deterioration.
1. Coin Holders: Plastic holders made from inert materials like Mylar or PVC-free flips are commonly used for long-term storage of individual coins. These holders protect against environmental elements while allowing easy viewing without physically handling the coin.
2. Coin Albums: Coin albums provide an organized way to display and store multiple coins together while offering protection against dust and moisture. They typically have clear plastic sleeves with slots tailored to specific coin sizes.
3. Coin Tubes: Ideal for storing larger quantities of similar-sized coins such as pennies or dimes, coin tubes are cylindrical containers made of inert materials like polypropylene that shield against air exposure and physical damage.
4. Avoiding Direct Contact: When handling coins outside of protective holders or albums, make sure to use clean cotton gloves or hold them by their edges only. Finger oils can leave residue on the surface of the coin over time, potentially affecting its appearance and value.
5. Controlled Environment: Store your collection in a cool, dry place away from direct sunlight and extreme temperature fluctuations. High humidity can accelerate corrosion, while heat and UV rays can cause discoloration or fading of coin surfaces.
6. Regular Inspection: Periodically check your stored coins for any signs of deterioration or damage. If detected early, issues like toning, spotting, or residue buildup can often be addressed with gentle cleaning techniques before they worsen.
Remember that proper preservation is crucial not only for maintaining the value of your coins but also for preserving their historical significance. When in doubt about cleaning methods or storage options, consult with experienced numismatists or professional coin conservationists who can provide expert advice tailored to specific types of coins.
Conclusion
Cleaning and preserving coins found while metal detecting require careful consideration to ensure their long-term value and historical integrity are maintained. While some coins may benefit from gentle cleaning using mild soap or soaking in distilled water, others may be best left untouched if the dirt does not affect their details significantly. Chemical solutions should only be used by experienced collectors as a last resort.
Once cleaned, appropriate storage methods such as coin holders, albums, or tubes should be employed to protect the coins from environmental factors and physical damage. Avoid direct contact with bare hands to prevent oil residue build-up on the surface.
By following these guidelines and regularly inspecting your collection for any potential issues, you will be able to enjoy your metal detecting finds for years to come while preserving their beauty and historical importance. Remember, when it comes to cleaning and preserving coins found through metal detecting – less is often more!