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<p>[QUOTE=&quot;desertgem, post: 24738552, member: 15199&quot;]It is a silly nomenclature if I ever heard one. It is not a &quot;Disease&quot; , it&#039;s a common chemical reaction that needs a metal like copper, moisture ( which may not appear as liquid water) and medium to high temperature. It is what people with non-ancient coins call Verdigris. If the coin is put into an air tight capsule, flip. etc.there should not be verdigris. If a person doesn&#039;t like capsules or flips, put them in a box or container lined with sanded copper tape strips. They will turn green long before a coin. If the tape does start to change,&nbsp; just replace. it. Jim[/QUOTE]</p><p><br /></p>

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