[Jewelry making - Article 00156] - Re: [Orchid] Green and black on new castings

[Kathy Johnson]

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>     Sounds like you had some dirt in your metal. The black stuff is
>     probably dirt encased in melted borax flux. If it won't come off
>     on the pickle, take your buttons, heat them up and quench them in
>     the pickle. 

    I don't use borax in the electromelt. Could the black stuff possibly
    be carbon from unburned wax? After cleaning all these castings, I had
    a lot of incomplete castings from waxes that were carefully
    inspected. I'm suspecting the flasks were not fully burned out, even
    though they were bright white on the outsides. I'm still curious 
about
    the mottled green markings on the metal buttons though. What could
    that be? 

Kathy Johnson
Feathered Gems Jewelry
http://www.fgemz.com
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