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<p>[QUOTE=&quot;BadThad, post: 25931421, member: 17261&quot;]I have to disagree, sorry Doug. All verdigris salts attract and hold water and can provide the feed materials (most notably hydroxide ion) to initiate corrosion on any coin which it may contact. Inside any tiny patch of verdigris there are many complicated reactions occurring - sealed from air/water or not. </p><p><br /></p><p>Here is a great example of contact corrosion. I got lucky and found this &quot;mated corroded pair&quot; in a bank roll. It took quite a bit of force to separate them! It is quite clear that a heavily corroded cent induced corrosion to an otherwise normal 1975 cent by simply being next to it in the roll. </p><p><br /></p><p>[ATTACH=full]1650629[/ATTACH] [ATTACH=full]1650630[/ATTACH] [ATTACH=full]1650631[/ATTACH] [ATTACH=full]1650632[/ATTACH] [ATTACH=full]1650633[/ATTACH][/QUOTE]</p><p><br /></p>

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