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<p>[QUOTE=&quot;GDJMSP, post: 3568285, member: 112&quot;]As for the OP&#039;s original question.</p><p><br /></p><p><br /></p><p><br /></p><p>The industry standard is that all paper and paper products are manufactured using sulfur. So, if you wish to buy envelopes that have no sulfur in them, then you must buy those that specifically state they are sulfur free. </p><p><br /></p><p>If envelopes do not specifically state that they are sulfur free, then it&#039;s a pretty good bet they are not. And I say that because producing sulfur free paper is a good bit more expensive than producing paper that is not sulfur free.</p><p><br /></p><p>Regarding your desires for toning testing. You first need to understand something. The specific conditions in your home have far, far more to do with how a coin will or will not tone than what you store coin in has to do with it ! </p><p><br /></p><p>To put it another way for you, if you and another, even one living in the same town as you, take identical coins and store them using identical methods for identical time periods - your coins, and the other guys - are going to tone differently. </p><p><br /></p><p>And to make it even more complicated, both of you will have coins that toned differently that other coins that each of you had. In other words some of your coins may tone one way while others will have no visible toning at all, and some will simply have different toning from all the rest. You see, the coins themselves are also a variable. </p><p><br /></p><p>I&#039;m not trying to dissuade you from doing your testing, not in any way. I am merely trying to make you aware that you can have no expectations in any direction. About the only thing you can be certain of is that everything will be different.[/QUOTE]</p><p><br /></p>

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