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<p>[QUOTE=&quot;davidh, post: 528332, member: 15062&quot;]I believe you are saying what I have been saying - if verdigris has developed on a coin and the coin is removed from the influences of the acetates, carbonates, sulfates or chlorides that produced it, then it will not continue to grow, e.g., if a coin in Montanna develops verdigris after having been mishandled and/or stored in a PVC holder is removed from the holder and sold to someone in Arizona, then the growth of the verdigris will stop when it is in its new home without the contaminates which caused the verdigris.</p><p><br /></p><p>One point of clarification would be appreciated - if there is verdigris on a coin, is that verdigris stable in the sense that it is the end result of the reaction(s) that caused it?&nbsp; Or are there still free acetates, carbonates, sulfates or chlorides present just waiting for moisture to continue the process anew?&nbsp; <u><i>IF</i></u> that is the case then I can see how physical contact with a fresh coin could start the process on the second coin or could continue on the original coin.[/QUOTE]</p><p><br /></p>

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