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<p>[QUOTE=&quot;ffrickey, post: 1801410, member: 20613&quot;]A couple of days ago in my local coin club I came across an article in a German coin magazine describing the treatment of bronze disease with a laser, such as used by dentists (or ophthalmologists).&nbsp; There were striking pictures of a coin (unfortunately I have not been able to find them on the internet) before (with encrustation of cupric-hydroxide around the digit 5) and after.&nbsp; After zapping the coin a couple of times from the right and a couple of times from the left, the encrustation was completely removed, with no apparent trace on the coin.&nbsp; Obviously, the coin wasn&#039;t very far gone to begin with (otherwise there would have been pits) but I found the idea ingenious.&nbsp; Apparently the laser is designed to blast away anything containing water (as does copper hydroxide).&nbsp; The writer went on to speculate about the eventual price of such commercial treatment, concluding it would run to 100-150 Euros per coin, which would rule out doing this on a routine basis, but if any of you have a dentist friend who would be willing to let you play with his laser machine (priced around 20-30 thousand Euros) for half-an-hour, and have some afflicted coins, it definitely sounds worth a try.[/QUOTE]</p><p><br /></p>

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