[Jewelry making - Article 00121] - Re: [Orchid] Cement-like gunk on castings

[Shannon Calloway]

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    Peggy, You have an improper burnout compounded with dirty metal. The
    top of your burnout cycle should be 1350 and the investment should
    be chalky white before casting. It sounds like your casting
    temperature could be too high also. Are you trying to cast wings with
    thick bodies or leaves? Organic material needs a longer hold at 1350
    to clean out the residue. Try changing your burnout cycle and
    cleaning the metal before casting. 

Good Luck!!
Shannon
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