Cleaning and Preservation of Coins - A Complete Guide
This section contains information on what to do and what not to do with finds from recovery to collection.
The information presented in this section is primarily for the inland coin hunter, however, those detectorists who search for jewelry and relics, and everybody else who collect the coins and artefacts, can greatly benefit from reading these chapters as well.
In the chapters below you can find some useful tips and information related to cleaning and preservation of coins, tokens, medals or relics. Please feel free to that could help others!
To determine wether your coin is a key-date piece, i.e. highly valuable, or not, you can visit my Numismatic Corner - a guide to the US and other coins, where you will find US coins' key-dates, coin images, numismatic information and specifics.
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CONTENTS:
1. Individual Descriptions of Coin Metals, Alloys and Their Natural Changes:
Platinum, Gold, Silver, Nickel and Copper
True and False Patina of Copper
Iron, Zinc, Tin, Lead and Aluminum
2. Cleaning of Coins
Mechanical Cleaning of Coins:
1) Soaking Before Cleaning
2) Cleaning with Brushes
3) Cleaning with a Toothpick
4) Cleaning with Masking Tape
5) Cleaning with Ink-Erasing Pencil
6) Carpenter's Glue Method
7) Wet Cleaning with Rubbing with Fingers
8) Removal of Tar
9) Removal of Other Unnatural Coatings
10) Cleaning with Tumblers
Chemical Cleaning of Coins:
1) Immersion Bath
• Hydrogen Peroxide Bath
• Ammonia Solution Bath
• Vinegar and Salt Bath
2) Reduction
• Electromotive Series
3) Ultrasonics
4) Electrolysis
5) Soaking After Cleaning
Cleaning Silver Coins
Cleaning Gold Coins
Cleaning Copper, Bronze and Brass Coins
Cleaning Aluminum Coins and Tokens
Cleaning Iron Coins
Cleaning Zinc Coins
Cleaning Tin Coins
Cleaning Lead Coins
Cleaning Clustered (or so-called Unearthed) Coins
Cleaning Lacquered Coins
3. Brightening of Coins:
Brightening Silver Coins
Brightening Copper Coins
Brightening Gold Coins
4. Tarnishing of Coins:
Tarnishing Silver Coins
Tarnishing Copper Coins
• Artificial Patination of Copper Coins (9 Desirable Color Tones)
Tarnishing Zinc Coins
Tarnishing Iron Coins
5. Repairing of Bent Coins
6. Restoring Worn Impression to Visibility
7. Preservation and Conservation of Coins
Safekeeping of Coins:
1) Mounting Coins on Trays, Displays
2) Plastic Bags
3) Coin Holders
4) Coin Albums
Useful Tips for Preservation of Coins:
1) Protection Against Sun Rays
2) Separate Storage of Various Coin Metals
3) Lacquering Coins
4) Protection by Oils
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