Shine Bright: A Guide to Cleaning and Preserving Zinc Pennies
Cleaning and Preserving Zinc Pennies: A Retrospective Guide
As a metal detector hobbyist, it’s common to come across various types of coins during your searches. Among the most common ones are pennies, which can be exciting finds for collectors. However, the condition of these coins is not always ideal, especially if they’ve been buried underground or exposed to harsh elements for extended periods.
Zinc pennies, in particular, pose unique challenges when it comes to cleaning and preservation. This type of coin was first introduced in 1982 as a replacement for copper pennies due to rising production costs. While zinc is cheaper than copper, it’s also more susceptible to corrosion and wear over time.
If you’re lucky enough to find a zinc penny while metal detecting, here’s what you need to know about cleaning and preserving it.
Identifying Zinc Pennies
Before diving into how to clean zinc pennies properly, let’s first discuss how you can identify them from other types of pennies. The easiest way is by checking the date on the coin. Any penny minted before 1982 will have a composition of 95% copper and 5% zinc. On the other hand, any penny minted after that year will have a composition of 97.5% zinc and only 2.5% copper.
In addition to checking the date on the coin itself, you can also use a magnet test as an alternative method for identifying zinc pennies quickly. Unlike pre-1982 copper pennies that are non-magnetic due to their high copper content, post-1982 zinc cents will stick strongly to magnets.
Cleaning Zinc Pennies
Once you’ve identified that your penny is made from post-1982 materials with high levels of zinc content (by either date-checking or using magnetic attraction), you’ll want to start thinking about cleaning them up so they look great again!
It’s essential to understand that cleaning zinc pennies is a delicate process, and the wrong method can cause further damage or even destroy them. Here are some dos and don’ts when it comes to cleaning these coins:
Do’s:
– Use mild soap and warm water to gently scrub dirt and grime off the surface of the penny.
– Soak the coin in distilled water for several hours before cleaning if necessary.
– Use a soft-bristled toothbrush or cotton swab for gentle cleaning.
Don’ts:
– Don’t use abrasive materials like steel wool or sandpaper as they can scratch the surface of the coin.
– Avoid harsh chemicals such as vinegar, lemon juice, bleach, or acids that can corrode and dissolve zinc over time.
Preserving Zinc Pennies
After you’ve successfully cleaned your zinc pennies without causing any damage, it’s time to think about how you can preserve their current condition. While no preservation method guarantees long-term protection against environmental factors like humidity, temperature changes, or oxidation; here are some best practices:
1. Store Your Coins in Acid-Free Containers:
Acid-free containers prevent chemical reactions between your coins’ metallic surfaces and any other substances that may cause corrosion over time.
2. Keep Them Dry:
Avoid exposing your coins to damp environments since moisture is one of the leading causes of rusting in metals like zinc.
3. Handle With Care:
Fingerprints left on metal surfaces like those found on coins will cause them to deteriorate faster due to oils from our skin reacting with metals over time.
4. Rotate Your Collection Display:
If you display your collection frequently, consider rotating which ones are out so they all receive equal exposure levels without being exposed indefinitely!
Final Thoughts
In conclusion, identifying post-1982 zinc pennies by date-checking or using magnetic attraction methods is crucial before attempting any clean-up procedures! Once identified correctly (and carefully), you can use gentle cleaning methods to remove dirt and grime from the surface of your coins without causing any further damage. Then, store them in acid-free containers, keep them dry, handle with care, and rotate your collection display to preserve their condition for as long as possible!