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Message:: [QUOTE="GDJMSP, post: 928187, member: 112"]It depends on many variables, but if you're lucky it might take a year. Were they ? Just because Red examples exist today that doesn't mean they were Red 20 years ago. Even copper coins can be dipped. But let's assume they were not dipped. How then did they manage to stay Red ? Well, there are several scenarios. Blind luck for one. Whether the coins were stored in a Mason jar with a sealable lid, a cookie or cracker tin with a snap on lid, we'll never know. But whatever it was, it was blind luck that coins were stored in some manner that managed to protect them from the air that turns Red copper Brown. But the majority of them were stored in rolls, and only some few of the inner coins retained their Mint Red color. How many of your coins do you store in rolls ? I'll wager not one. It's not just outside the slab, they are doomed inside the slab as well. Copper is the most reactive of our coinage metals. It doesn't matter if the coin is in a slab, in an album or sitting on the window sill - in time that Red coin is going to turn Red Brown or Brown. It's not a question of if - it's a question of when. For proof of this take a look sometime at how many RB coins you see in Red holders. Also consider that the TPGs don't even offer a guarantee on copper color. NGC used to noit guarantee them at all. Then in effort to compete with PCGS they offered a guarantee for 10 years on color. Then PCGS dropped their color guarantee all together. NGC will likely follow soon. But the when can be delayed with proper storage.And that is the best you can hope for. The less air that can get to those coins, the longer they will stay Red. But in an album ? You aint got a chance.[/QUOTE]

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