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<p>[QUOTE=&quot;GDJMSP, post: 157129, member: 112&quot;]In the cases of the type pictured here, at least in those that I have seen, there is no cardboard. The inner portion of the case that holds the coin is hard plastic. And these cases are known for producing some rather nicely toned coins.</p><p><br /></p><p>However, there is something that should be considered. Once toning starts to turn dark brown, if left alone in the same environment it will continue until it turns black. This is not good. For once toning turns that dark it begins to corrode the coin and damage it. It is usually advisable to remove the coins from the present storage container and place them into new holders, before they reach this point, taking care to make sure that they stored in an area away from all humidity and of a consistent temperature.[/QUOTE]</p><p><br /></p>

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