[Jewelry making - Article 00052] - Re: [Orchid] Casting - Metal Flow Over Stone

[Alberic]

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Karen:

    I've had it happen occasionally, so it's not unique to you, although
    usually mine were very thin flashes over parts of the CZ's, rather
    than the whole upper surface of the stone. 

    I don't use debubblizer, so that's not the culprit. My thought has
    been that the stone shifted very slightly in the investment, due
    either to a rough bounce when loading the casting machine, or thermal
    expansion, or the simple malice of Murphy. 

    Cleaning them off wasn't enough trouble for me to worry about it
    overmuch. I used an engraving tool to peel up an edge of the
    flashing, and then use the wedge-shaped front end of a flat graver to
    peel it back far enough to cut off with another engraving tool. If
    you're totally covered, carefully engrave down towards the table of
    the stone until you can start peeling it off. 

    If you get "the one true answer" about why this happens, let me
    know. Meanwhile, this should help you clean them up a little more
    easily. 

Regards,
Brian Meek.

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