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<p>[QUOTE=&quot;Just Carl, post: 149752, member: 4552&quot;]Try a slight touch of Vinegar on the actual spot. Most pure Vinegars contain about 4 % Acetic Acid which sould nutralize the green discoloration. Note that all green discolorations on Copper coins is NOT necessarily extensive and may just be a slight layer of Copper Carbonate which is normal on Copper exposed to Oxigen and Carbon Dioxide. However, the safest thing to do is just rinse the coin is distilled water to see if it will rinse off, blow dry the coin. Even better is to not mess with the coin and seal it in a 2x2. If no further exposure to Oxygen, Carbon Dioxide, etc. no further spreading of that green stuff should occur. </p><p>Your greenish color is probably not Verdigris. This term is abused and is normally intended for Copper exposed to SO3 or SO4 radicals with moisture.[/QUOTE]</p><p><br /></p>

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