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<p>[QUOTE=&quot;GDJMSP, post: 14324451, member: 112&quot;]It&#039;s pretty much a certainty that they have an effect since to the best of my knowledge the paper and ink is not archival, not inert in other words, it&#039;s just plain paper and ink. And all paper products, with the exception of archival grade paper, is made with sulfur. And sulfur causes toning. </p><p><br /></p><p>It&#039;s well known that coins in slabs tone. Is it because of the paper labels ? As I said it&#039;s bound to have an effect, but what almost certainly has a greater effect is that no slab is airtight. Therefore the air can and does get to the coin inside the slab. And any coin that is exposed to the air is going to tone. That much is a given.</p><p><br /></p><p>As collectors the thing we have to do is to minimize how much air gets to the coins. And by doing that we greatly decrease the rate at which toning occurs. That is the very idea behind utilizing proper coin storage methods. And it works.[/QUOTE]</p><p><br /></p>

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