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<p>[QUOTE=&quot;GDJMSP, post: 7892168, member: 112&quot;]The only thing that will stop further verdigris from forming on a coin is proper storage. And for that matter, verdigris can already be present on a coin, and proper storage will prevent more verdigris from forming.</p><p><br /></p><p>Verdigris is caused by 2 things, the air and moisture. That moisture can come from an outside source, meaning anything that allows water to get onto the coin, or from humidity in the air itself. It is the combination of air and moisture that allows the coin to corrode. And when the coin corrodes what used to be copper turns into verdigris. In simple terms, verdigris is nothing more than copper rust - just as rust forms on corroded iron or steel.</p><p><br /></p><p>While Verdi-Care will remove light verdigris from a coin, it will not prevent more verdigris from forming on a coin unless that coin is stored properly.[/QUOTE]</p><p><br /></p>

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