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<p>[QUOTE=&quot;BadThad, post: 20975511, member: 17261&quot;]Regardless of the environment, if there any feed materials at all, the process has all it needs to further attack the metal within that mass.</p><p><br /></p><p>Verdigris is primarily composed of ionic compounds. On a macro scale it appears like it&#039;s just a normal, stagnant mass of material. However, on the smallest of scales of chemistry, that mass is very active due to the ionic charge imbalances contained within. </p><p><br /></p><p>Given the verdigris is also connected to a metal (which in itself is feed material) -&nbsp; there&#039;s a constant fight to reach equilibrium on an electrochemical scale. Even something like a 0.1° change in temperature &quot;stirs the pot&quot; and pushes the equilibrium in the other direction. The more dynamic the ambient conditions, the more active the mass will be.</p><p><br /></p><p>Generally, I do not recommend a vacuum for storing coins. I&#039;ve debated this topic a billion times on the internet and do not wish to again but I&#039;ll state my position: A vacuum is an invitation to allowing air in and eventually <u>IT WILL</u>. Mother Nature always wins. Even the using the best laboratory conditions and equipment - vacuums leak. This creates a dynamic atmosphere and dynamic conditions can drive the corrosive process be it with air, temperature, or other complicated reactions within a mass of verdigris.[/QUOTE]</p><p><br /></p>

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