[Jewelry making - Article 00012] - Re: [Orchid] Likely Toxicity from Patinas?

[Charles Lewton-Brain]

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>            I'm interested in whether heat patinas on copper or bronze
>     are possibly toxic (contact toxicity)through long-term wear (like
>     on a bracelet). I'd also like to find out if blackened brass (via
>     the stuff used on gun barrels) might possibly be toxic (contact
>     toxicity). 

Hi Terri,

    Bascially all green and crusty patinas should not be in contact with
    skin, and I would feel dubious about using selenium based blackeners
    on surfaces next to skin. The simple answer is that any surfaces next
    to skin should be bare metal, without a patina on it.  I suspect a
    light liver of sulfuring which  would wear off, as would other
    finishes, would not be harmful. 

best
Charles

Charles Lewton-Brain/Brain Press
Box 1624, Ste M, Calgary, Alberta, T2P 2L7, Canada
Tel: 403-263-3955  Fax: 403-283-9053  Email: brainnet AT telus.net

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