Preserving Your PCGS Blind Pack Treasures: A Conservationist’s Guide to Long-Term Protection

Introduction

I’ve seen too many valuable pieces ruined by improper cleaning or storage. Here is how to keep this safe for the next generation.

Understanding the PCGS Blind Pack Concept

The PCGS Blind Pack program offers collectors an exciting opportunity to submit coins and banknotes by June 30th for a chance to receive exclusive prizes. While the thrill of potentially winning valuable items like 1/4 oz. gold pieces or 1 oz. silver rounds is enticing, the true value lies in how you preserve whatever treasures you receive.

The Science of Toning and Oxidation

Toning is a natural process that occurs when silver and copper coins react with sulfur compounds in the air. This creates a thin layer of tarnish that can range from light golden hues to deep blues and purples. Many collectors prize beautifully toned coins, as they can enhance a coin’s aesthetic appeal and potentially its value.

However, oxidation is a different matter entirely. While toning is a surface phenomenon, oxidation can penetrate deeper into the metal, causing irreversible damage. For silver coins, this often manifests as black spots or pitting. Copper coins may develop a green patina, which, while attractive on ancient coins, is generally undesirable on modern pieces.

To prevent unwanted oxidation:

• Store coins in a cool, dry environment with stable humidity levels (ideally between 40-50% relative humidity)
• Use silica gel packets in storage containers to absorb excess moisture
• Avoid handling coins with bare hands, as oils and acids from skin can accelerate tarnishing

The Dangers of PVC Damage

Polyvinyl chloride (PVC) is a common plastic found in many coin holders and flips manufactured before the 1980s. When exposed to heat and humidity, PVC can break down and release hydrochloric acid, which causes a distinctive green slime to form on coins. This damage is permanent and can significantly reduce a coin’s numismatic value.

To protect against PVC damage:

• Immediately transfer coins from PVC-containing holders to archival-quality materials
• Look for holders labeled “PVC-free” or “archival safe”
• Consider using inert materials like Mylar or polyethylene for long-term storage

Choosing the Right Holders

The proper holder can mean the difference between a coin that maintains its value for generations and one that deteriorates rapidly. For PCGS-graded coins from Blind Packs, consider these options:

Air-Tite Holders

These acrylic capsules provide excellent protection against physical damage and environmental factors. They’re available in various sizes to accommodate different coin denominations and are completely inert, meaning they won’t react with your coins.

Intercept Shield Boxes

These specialized storage boxes contain a proprietary material that neutralizes corrosive gases. They’re particularly useful for long-term storage of valuable collections.

Temperature-Controlled Cabinets

For serious collectors, investing in a humidity and temperature-controlled cabinet can provide the ultimate protection. These units maintain consistent environmental conditions, crucial for preserving delicate toning and preventing corrosion.

To Clean or Not to Clean: The Eternal Debate

This is perhaps the most controversial topic in coin collecting. The general rule among conservationists and professional numismatists is: don’t clean your coins. Cleaning, even when done gently, can remove the natural patina that develops on coins over time. This patina, often called “coin skin” or “mint luster,” is part of a coin’s character and history.

However, if you absolutely must clean a coin:

• Use only distilled water and mild, non-ionic soap
• Never use abrasive materials or harsh chemicals
• Consult a professional conservationist before attempting any cleaning

For coins from PCGS Blind Packs, it’s best to leave them in their original holders unless you’re experiencing issues with PVC or other damaging materials.

Long-Term Preservation Strategies

Preserving your PCGS Blind Pack treasures requires a multi-faceted approach:

Environmental Control

Maintain a stable environment with:

• Temperature between 65-70°F (18-21°C)
• Relative humidity between 40-50%
• Minimal exposure to direct sunlight
• Protection from air pollutants and sulfur compounds

Regular Inspection

Periodically examine your collection for signs of:

• Discoloration or unusual toning
• Physical damage to holders
• Pest infestations (yes, even coins can be affected by certain insects)

Documentation

Keep detailed records of:

• Acquisition dates and sources
• Grading information
• Any conservation work performed

The Value of Proper Preservation

While the excitement of potentially winning prizes from PCGS Blind Packs is undeniable, the true value of these items lies in their long-term preservation. A coin that’s properly cared for can maintain or even increase its value over time, becoming a cherished heirloom or a valuable investment.

Consider this: a 1921 Morgan Dollar in pristine condition might be worth $50 today, but that same coin, if improperly stored and damaged, could lose 90% of its value. The cost of proper storage materials and environmental controls is minimal compared to the potential loss in value from neglect.

Conclusion

The PCGS Blind Pack program offers collectors an exciting opportunity to potentially acquire rare and valuable items. However, the true prize lies not in what you might win, but in how well you preserve it. By understanding the science of toning and oxidation, avoiding PVC damage, choosing appropriate holders, and resisting the urge to clean, you can ensure that your collection remains valuable and beautiful for generations to come.

Remember, every coin tells a story, and it’s our responsibility as collectors to preserve that story for future generations. Whether you’re a seasoned numismatist or a newcomer to the hobby, proper preservation techniques are the key to maintaining the integrity and value of your collection.

Happy collecting, and may your PCGS Blind Packs bring you both joy and valuable treasures to preserve!

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