Unearthing the Past: A Guide to Cleaning and Preserving Metal Detecting Finds
Cleaning and Preserving Finds: A Guide for Metal Detecting Enthusiasts
Introduction:
Metal detecting is a thrilling hobby that allows individuals to uncover hidden treasures from the past. Whether you stumble upon ancient coins, valuable jewelry, or historical artifacts, it is essential to know how to clean and preserve your finds properly. By following the right techniques, you can enhance the beauty of your discoveries while ensuring their long-term preservation.
In this guide, we will explore various methods and tools used to clean different types of materials commonly found during metal detecting expeditions. Additionally, we will discuss best practices for preserving these finds in order to maintain their integrity and value.
Cleaning Techniques:
1. Dry Cleaning:
Dry cleaning is often the first step when dealing with freshly dug items. This method involves removing loose dirt and debris without using any liquid solutions. Use a soft brush or toothbrush to gently scrub away surface dirt from metal objects or delicate items like ceramics or glass. Ensure that no abrasive materials are used as they may cause scratches.
2. Water Bath:
For finds covered in stubborn dirt or encrusted mud, a water bath can be effective when done correctly. Fill a container with warm water (not hot) and add mild dish soap or specialized metal cleaning solution recommended by professionals. Immerse the item in the water and let it soak for some time until loosened debris starts coming off naturally.
While soaking, avoid touching fragile areas of an artifact directly as they may break apart easily due to prolonged exposure to moisture. For stubbornly attached grime, use a soft-bristled toothbrush or cotton swabs dipped in soapy water to gently remove them.
3. Electrolysis:
Electrolysis is an advanced technique suitable for heavily corroded metallic objects such as iron relics or coins that have fused together over time due to oxidation processes beneath the ground’s surface.
To perform electrolysis, create an electrolyte solution by dissolving a small amount of sodium carbonate (washing soda) in warm water. Place a non-metallic container filled with the electrolyte solution and suspend the corroded item using a non-conductive material, ensuring that it does not touch the sides or bottom of the container.
Connect a sacrificial anode, typically made of iron or steel, to one terminal of a low-voltage power supply (such as a battery charger) and submerge it into the electrolyte solution without touching the artifact. Connect the other terminal to the artifact itself. This setup will initiate an electrochemical reaction that releases oxygen gas from rust while loosening its grip on your find.
Electrolysis requires close monitoring due to potential risks associated with power sources and hydrogen gas production during the process. It is crucial to follow safety guidelines and seek advice from experienced individuals before attempting this method.
Preservation Techniques:
1. Patina Preservation:
Patina refers to the natural oxidation or aging process that adds character and value to certain metal objects like coins or jewelry. Preserving patina is important for maintaining their historical significance and aesthetic appeal.
To preserve patina, avoid using harsh cleaning agents or abrasive materials that might remove layers of oxidation. Instead, gently clean such items with soft brushes or cotton swabs dipped in water-based solutions specifically designed for preserving patinated surfaces.
2. Coating:
Applying protective coatings can help prevent further degradation caused by exposure to air, moisture, or handling over time. However, coating should only be considered for non-archaeological finds since it may affect their historical authenticity.
For metal objects susceptible to corrosion like iron relics, applying microcrystalline wax provides an effective barrier against environmental factors while preserving their appearance and structural integrity. Similarly, clear lacquers formulated for metals can be used on copper-based artifacts like coins or decorative pieces after careful consideration of their long-term effects.
3. Storage:
Proper storage is crucial for preserving finds in their original condition. Keep metal objects away from extreme temperature fluctuations, direct sunlight, and high humidity environments to prevent accelerated deterioration.
Use acid-free tissue paper or archival-quality plastic pouches to wrap delicate items individually before storing them in airtight containers like plastic bins or glass display cases. Label each find with relevant information such as date, location, and any known historical context to maintain an organized record of your collection.
Conclusion:
Cleaning and preserving metal detecting finds involves careful consideration of the item’s material, condition, and historical significance. Following the appropriate cleaning techniques ensures that dirt and grime are safely removed without causing damage. Preservation techniques help maintain the integrity and value of finds while protecting them from environmental factors that can lead to deterioration over time.
Remember, if you are uncertain about how to clean or preserve a particular artifact properly, it is always best to consult experts or professional conservators who can provide guidance based on their knowledge and experience. By taking these steps toward responsible care and preservation, you will be able to enjoy your metal detecting treasures for years to come while contributing towards preserving our shared history.