Newer mint bags still tone coins

I put a roll of SBA's in a mint bag about one year ago.
I was looking through today and saw that some are toning.
Actually making SBA more appealing
Granted that it is not huge toning but its only been a year and the mint bag is in my safe
I thought that the mint bags don't allow them to tone like the old ones did?
Or is it toning because it is open to the air?
You can see the crescent shape on the obverse where other coins were lying on it.
Stefanie
I was looking through today and saw that some are toning.
Actually making SBA more appealing

Granted that it is not huge toning but its only been a year and the mint bag is in my safe
I thought that the mint bags don't allow them to tone like the old ones did?
Or is it toning because it is open to the air?
You can see the crescent shape on the obverse where other coins were lying on it.
Stefanie

CoinsAreFun Pictorials Album
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CoinsAreFun Toned Silver Eagle Proof Album
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Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
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More CoinsAreFun Pictorials NGC
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CoinsAreFun Toned Silver Eagle Proof Album
.
Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
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Comments
<< <i>The problem is, no matter how much that one tones, it will always be a SBA
Exactly what are you trying to say Jeremy??? ....Come on don't beat around the bush
just say you don't like SBA
Stefanie
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CoinsAreFun Toned Silver Eagle Proof Album
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Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
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More CoinsAreFun Pictorials NGC
``https://ebay.us/m/KxolR5
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Stefanie
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CoinsAreFun Toned Silver Eagle Proof Album
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Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
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If it weren't for flashbacks I'd technically have no memory.
"Inspiration exists, but it has to find you working" Pablo Picasso
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If it weren't for flashbacks I'd technically have no memory.
Man, don't I know it!
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If it weren't for flashbacks I'd technically have no memory.
Man, don't I know it!
Oh man... I know you can relate to this one. Susie WHO ?
``https://ebay.us/m/KxolR5
You wouldn't believe how long it took to get him to sit still for this.
If by "old coins" you mean 90% silver - they tone much easier.
I think they put nickel in stainless steel. So you really have to work to tone copper nickel.