[Jewelry making - Article 00658] - Re: [Orchid] Yellow tarnish on Silver

[FrodoGem]

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>       I'm having a problem with this yellow tarnish that appears on
>     newly completed pieces.  I mostly work with turquoise and silver.
>     My process is that once the buffing is complete I clean the piece
>     with a tooth brush and dish soap.  Then into the ultrasonic.  Then
>     another scrub with tooth brush and water.  I then let the piece
>     dry out overnight then I put each piece individually into a zip
>     lock bag. 

    This may be a stretch but do your zip lock bags come wrapped with
    rubber bands?  Over time, some materials can leach into or through
    plastic.  The only thing I can think of is that rubber band contact
    with the bags at the top and bottom of the stack over time may
    contaminate the bags with small amounts of the sulfer used for
    vulcanizing the rubber.  As you pull several bags from the stack, the
    one that has been in contact with the rubber band for any significant
    time could be contaminanted thus producing a slight tarnish on the
    contents.  If indeed the bags are wrapped in rubber bands, I would
    try removing the rubber immediately and discarding a bag or two from
    both the top and the bottom of the stack. 

Howard
Eagle Idaho


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