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<p>[QUOTE=&quot;ageka, post: 19833, member: 1485&quot;]On some European boards I have read about several electrochemical methods of cleaning </p><p>Like you spit on boths sides of the coin ; you wrap it in aluminium foil and then slightly rub the foil for 60 seconds </p><p>The enzimes in the saliva give an electrochemical reaction between the coin and the aluminium generating heat</p><p>Afterwards wash in distilled water </p><p>This will only work on materials more noble then aluminium otherwise you will oxydise the coin instead of de oxydising it</p><p>And since I graduated 33 years ago I do not remember the electrochemical hyrarchy of metals but if it works it should work on silver[/QUOTE]</p><p><br /></p>

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