[Jewelry making - Article 00665] - Re: [Orchid] Yellow tarnish on Silver

[JETT Research]

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>     I then let the piece dry out overnight then I put each piece
>     individually into a zip lock bag.  About 1 out of 10 pieces gets
>     this yellow tarnish on the flat back, polished silver side. 

    Rick, The plastic in the bag may be contributing to your tarnish
    situation. Plastic contains sulfur and sulfur is the great evil to
    sterling silver. You might try switching bag types or there are small
    paper patches that you can include in the bag with the pieces that
    absorb the sulfur fumes more aggressively than does the silver
    jewelry.  You might try Rio Grande since they are in the heart of
    silver country. (Albuquerque, NM).  It also makes me wonder if these
    pieces are assembled instead of cast.  Myself and most of the folks
    that I hang with out here in New Mexico heat from the back when we
    are assembling a southwest piece of jewelry.  During that heating
    you may be getting some alloy segregation on the occasional piece
    because of the human factor.  The part with more exposed copper in
    the grain boundary may be the one that is getting the tarnish.  That
    might account for the variability. Just a thought.  If these are all
    castings with no assembly, then forget what I just wrote. 

Best Regards,
J. Tyler Teague
JETT Research



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