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<p>[QUOTE=&quot;BadThad, post: 2416951, member: 17261&quot;]&quot;Bronze disease&quot; is a term I cannot stand, diseases cannot infect metal. The correct description of &quot;BD&quot; is hydrochloric acid induced metallic corrosion. Most conservators use very strong bases to neutralize the acid, halt the reaction and displace the verdigris. Of course, for moderns, this is a HORRIBLE method since it will strip the surface....but ancient coins are a whole different ballgame in the conservation world.</p><p><br /></p><p>Ancient coins are much more complicated when compared to fresh verdigris. Given the time scale, verdigris can actually become so advanced it mineralizes. When that happens, I no longer even call it verdigris, it is not, it is a mineral deposit and cannot be removed without mechanical means.</p><p><br /></p><p>Personally, I&#039;ve done minimal testing with VC on ancients because of the mineralization process. However, if it&#039;s still in the verdigris stage due to improper storage during modern times, VC can often address and neutralize it. It may not fully remove the verdigris but it will neutralize it. VC is only designed to address light to moderate-type verdigris.[/QUOTE]</p><p><br /></p>

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