[Jewelry making - Article 00733] - Re: [Orchid] Casting reheating investment molds

[LEESSILVER]

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    I have had to reheat molds twice because of a failed oven.  Both
    times the molds were heated to about 800 degrees before the oven
    failed.  In one case I had to remove the molds and rebuild the oven
    which allowed the molds to cool considerably. The other time
    transferred the molds into a spare oven that was allowed to heat up
    to about 400 degrees before the transfer was made. The castings in
    both cases came out OK. 

    I guess that it would depend on the temperature the molds reached
    before the cooling took place.  If moisture in the mold is important
    for proper burn out, the loss of some moisture before cooling and
    reheating take place might cause failures. 

    Again I think that the status an artist has with the angels of
    artistic creation has a lot of what works and what does not work. 
    If it doesn't we would all be investing exactly the same way,
    burning out at the same sequence, heating the metal to the exactly
    the same temperature and pouring into molds of the exact same
    temperature and quenching the metal at the same delay time after
    pouring.  I am just joking about the angels but we all have success
    while using various times and temperatures.  What work for one may 
    not work for another.  

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