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<p>[QUOTE=&quot;GDJMSP, post: 3236273, member: 112&quot;]As was already pointed out oxygen is a requirement for toning to occur. So reduce the amount of oxygen getting to the coin and you slow down toning. Increase the amount and it speeds up. </p><p><br /></p><p>But that&#039;s only part of it. Other contaminants in the air also play a part. They work in conjunction with the gasses being put off by the album, and the oxygen. So it&#039;s the combination being just right that results in the toning being accelerated or slowed down, as well as the various colors produced.</p><p><br /></p><p>And again, that&#039;s only part of it. Consider this. A coin in an album, open on both sides, but covered by the slides. This means the gasses from only a small amount of cardboard are freely and readily coming into contact with the coin. Now remove the slides - and suddenly the gasses from all of the cardboard in the entire album, as opposed to just tiny pieces of the cardboard, have free and ready access to the coin. Which one is likely to affect the coin more ? </p><p><br /></p><p>The point I&#039;m making is that what seems to be intuitive, is actually counterintuitive. </p><p><br /></p><p>One should also always remember than when it comes to toning there are literally a thousand variables involved. And each one of them can change the outcome. This is why an entire group of collectors can all use the same album but each one of them have completely different results. Every person their is, their home is different from that of another person. And because their home is different the contaminants in the air is different.[/QUOTE]</p><p><br /></p>

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