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<p>[QUOTE=&quot;rlm&#039;s cents, post: 808053, member: 7957&quot;]Not at all disagreeing with you that the toning is caused by the staples, but what do you think is causing it?&nbsp; You have a chemistry background.&nbsp; You must have some idea&nbsp; Is the zinc coating volatile?&nbsp; Is the steel volatile?&nbsp; Something has to be volatile for the affects to travel the distance between the coin and the staple.&nbsp; I have my idea.&nbsp; See if we agree.[/QUOTE]</p><p><br /></p>

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