[Jewelry making - Article 00086] - Re: [Orchid] Burnout kilns - Casting shell

[Jewelpunk1]

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    I'm with Ron on this one. I have cast rattlesnake vertebra, bird's
    skulls & even chicken bones. When casting these types of material I
    soak the bones in molten wax for a while to try to get a bit of
    saturation to aid in their removal. I then wipe off the excess with
    cheesecloth. 

    I found that a larger than normal sprue helps in the elimination of
    ash. The chicken bones were too heavy to sprue with wax- I couldn't
    get enough adhesion and they kept floating to the top of the flask.
    I drilled a hole in the bone & 5 min. epoxied a small wooden dowel
    in place. I had to hold the flask  AT  1350 for over 24 hours &
    occaisionally blew the mold cavity out with compressed air (wear a
    face shield.)  

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