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<p>[QUOTE=&quot;TheNickelGuy, post: 1483170, member: 20201&quot;]PVC damage starts as a greasy sometimes shiny light green slime, sometimes a more thin almost layer like film, later it can bead up or come together in splotches, eventually turning a darker green and hardening. It will eat into the coin surface at this stage and become very difficult to impossible to remove as it reacts and bonds. Eventually it will become very dark green to or black and hard as the surface of the coin. At that point, it has eaten away at the surface and there will be pitting and corrosion under the PVC on the surface and into the coin.</p><p>Catching it early is probably the only hope.</p><p><br /></p><p>Verdigris is natural oxidation on copper. Steel rusts, copper and brass oxidize in this green appearance.</p><p>You can tell the difference easily with experience between PVC and verdigris.</p><p><br /></p><p>Verdigris will eventually get below the surface of the coin and pit the coin and corrode it since it is oxidation. It can be arrested and conserved but in both cases, the damage is done.</p><p><br /></p><p>PVC is far less desirable to find on your coins than verdigris. One is a natural occurrence, the other is a a result of improper storage in the wrong kind of plastic.[/QUOTE]</p><p><br /></p>

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