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<p>[QUOTE=&quot;GDJMSP, post: 561505, member: 112&quot;]Copper is the most reactive of all our coinage metals. About the only way to stop it from changing color is to stop the air from getting to it, otherwise <u>it is</u> going to change color.</p><p><br /></p><p>As for the difference in color between certain dates, that is largely due to changes in the alloy and nothing can be done about it.</p><p><br /></p><p>Air-Tites can be purchased for about 30 cents each - now is 30 cents too much to pay to protect your coins ? And of course you have to use proper storage techniques as well. And from the sound of things, you may not be doing that. So it is quite likely you will have issues down the road.[/QUOTE]</p><p><br /></p>

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