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<p>[QUOTE=&quot;ToughCOINS, post: 3047410, member: 20480&quot;]This is true.</p><p><br /></p><p>While the concentration drops with time, some will always remain as long as the holders are not chemically destroyed by a reaction that consumes all of the sulphur.&nbsp; Such a reaction would completely decay the boards to the point that they would not be identifiable.[/QUOTE]</p><p><br /></p>

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