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Re: [Orchid] Tumbling PMC
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Mary Ellin D'Agostino Monday, January 05, 2009
   
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>     Diamond Pacific, in Barstow, California, offer a dry shine system
>     called, Vibra-Dry. It works exquisitely, and is a wonderful
>     alternative to Steel Shot wet burnishing. it just takes a longer
>     time, but patience is rewarded. 

    I am unfamiliar with this product, but you do need to be cautious in
    what media you use to burnish or tumble silver metal clay pieces.
    Polishing compounds can get embedded in the porous metal. In the
    worst case scenario, the compounds get embedded in the surface of the
    metal and cannot be removed, leaving you with a dull dirty-looking
    piece that can never be polished to a high shine. Silver clay pieces
    need to be brushed or burnished with a stainless steel or brass brush
    either dry or with water (a very mild soapy solution is ok). Tumbling
    with stainless steel shot in a soapy solution is an alternative many
    people use. 

    After initial brushing or burnishing, it is generally ok to use
    polishing compounds as the pores of the metal have been closed. For a
    brief overview of tumbling metal clay, see:

    http://www.medacreations.com/TumblePolishingPMC.aspx 

    As for your particular tumbler, it depends on the construction as to
    whether or not you can use water with it. If you post what brand and
    model it is, maybe someone here can fill you in on its actual
    performance.... 

Mary Ellin D'Agostino, PhD
www.medacreations.com
Sr. Teacher, PMC Connection
Certified Artisan, PMC Guild


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