[Jewelry making - Article 00986] - Re: [Orchid] Leather tarnishing silver

[Ron Charlotte]

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    Most commercially prepared leather is either chrome "tanned" or
    tannin tanned.  If the cut edges show a greenish tint, then it's a
    chrome tanned leather.  Leather is a complex substance that is
    treated with a lot of different materials to make it handle specific
    ways, change the color, or preserve it.  Any of these steps could
    contain compounds that will promote silver tarnish (especially
    sulfur compounds, egg yolk, for example, is a traditional component
    of a number of leather dressings).  It could simply be that the
    chemicals in the glue are releasing the problem substances. 

Ron Charlotte -- Gainesville, FL
ronch2 AT bellsouth.net OR afn03234 AT afn.org


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