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Will it continue

Started by moondoggy,

2 posts in this topic

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Max Spiegel

Max Spiegel

Posted
  • Administrator
Posted

Thank you for your question.

 

NGC holders are made from inert materials that reduce the effects of oxidation. Nonetheless, NGC holders are not 100% airtight so toning, which is a natural process in which the air reacts with the surface of a coin, can still occur.

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