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After encapsulation, can the appearance of a coin change over time?

April 26, 2017Appearance coin encapsulation time

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After encapsulation, can the appearance of a coin change over time?

1 Answer

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10 Posted

A. Yes. In independent testing, the NGC security holder has been proven as the most effective grading service holder on the market today in minimizing the effects of oxidation. Even so, the NGC holder is not 100% airtight. Therefore oxidation, a normal process where air reacts with the surface of a coin, can continue after encapsulation. To further limit environmental hazards, we recommend storing your coins in a temperature-controlled, low-humidity area such as a bank safety deposit box. Be sure to check with your bank for rules and regulations concerning the storage of these items.