[Jewelry making - Article 00951] - Re: [Orchid] 18k pink gold casting problem

[RING14K]

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    Hi It appears as though you either heated the metal  to much during
    casting {copper alloys burn out rather quickly} and if they perhaps
    used platinum to get the pink instead of rose color, you may be
    dealing with a critical temperature duration so you can melt the
    alloy without losing the copper. my other thought is you may have
    left the mold in the vacuum chamber. let it spin to long, or
    quenched the mold to soon and you crystallized the metal.   just my 
    two cents    Ringman John Henry


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