Storing Coins Please help

That's terrible. It's not so much the box. I have coins everywhere. They don't develop that green stuff because what is in contact with them is inert or mostly so. Take for example my Coin Sets of the World; they are inside a semi-hard plastic, and this plastic is within a slim cardboard. These boards are then in those green boxes. I have yet to see these coin sets of the world have green corrosion like that, and this is because they are contact with inert stuff. You can have coins sitting out raw and the environment/air certainly can harm them, but that's in atypical settings like humid places, high heat (eg in the trunk of your car), etc. Since the mint over there made those, maybe the environment played a larger role

 

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