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<p>[QUOTE=&quot;2manybooks, post: 3685136, member: 8267&quot;]With the blue-green corrosion products, I suspect you may have a combination of copper carbonates (essentially azurite, from a reaction between the copper and the shell) and copper chlorides from the salt air. Both reactions are likely to continue even after a cleaning. In a museum setting, the solution would be to keep the object in a very dry environment.[/QUOTE]</p><p><br /></p>

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