[Jewelry making - Article 00106] - Re: [Orchid] Simple casting

[MidLife Crisis Enterprises]

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Skip and others,

    I would not pour hot metal into investment that has been "burned out"
    in an oven at 300 F for 1/2 hour!!  There is too much potential of
    "chemical water" still being in the investnment material in quantities
    high enough to cause metal to blow all over the place.  The physical
    water would possibly be gone in 1/2 hour (dependng on how thick the
    item is) but the chemical water will still be there.  This water will
    not drive off until the teme is up near 900 F.  This chemical water
    can cause just as bid an explosion and the physical water so I would
    recomment care here. Just my 2c, worth what it cost ya! John Dach  

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