[Jewelry making - Article 00602] - Re: [Orchid] Casting update

[David Duhne]

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    ¡Hola de nuevo! Moisture can only be a problem at the beginning of the
    burning cycle and just in the case that you have not waited two hours
    after investing, when the mold is still too wet, or if the kiln is
    heating too fast (the recommendation is to pre-heat up to 300°F and
    keep the mold at that temperture for 1 to 2 hours before rising again
    the temperature); but, how can you possibly have moisture after
    reaching and keeping 1,350°F for at least 1 to 2 hours? After a
    complete burning cycle (from 6 to 12 hours, depending on different
    factors)you definitely get rid of all moisture and, of course, you
    should have eliminated all carbon residues. This might be the problem
    that your teacher detected: fumes, not moisture. In this case, a good
    burning cycle and the presence of oxigen inside the kiln (good
    ventilation)should do. I hope this helps, Annette. 

Tu amigo
Arq. David C. Duhne
Director Tecnico y Comercial
Diamantex S.A. de C.V.
www.diamantex.com 

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