I'm going a bit off-topic here, but it's worth remembering that Nickel is a common source of Allergic Contact Dermatitis. Nickel is very common in the environment - coins, keys, and many other metal items contain nickel or are nickel-plated. A classic example of nickel-related Allergic Contact Dermatitis is, say, two supermarket checkout operators working together. One of them has no problems, but the other develops hand eczema (dermatitis) because of the nickel in the coins. The mechanism by which nickel, or any other non-protein substance, can cause allergic contact sensitivity, is complex. But basically, metal ions get incorporated into proteins in the skin and this triggers an allergic response, in susceptible persons. Nickel is commonly implicated in such allergic contact sensitivity reactions. Best regards, David Boycwe -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101015/a5ac9f6c/attachment.htm>
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