[Jewelry making - Article 00165] - Re: [Orchid] Cement-like gunk on castings

[Jeff Demand]

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Peggy,

    Sounds like your max burn out temp is too high, well above the
    programmed 1250. For fat (or thick) castings I generally cast with a
    flask temp of 800 or lower with silver. I don't think that your
    problems stem from using too much 'old' metal, I've been guilty of
    that and haven't had your problems... too hot a turnout or flask cast
    temp and it is a reproducible problem. 

    Please realise that while I have been doing this work for a long
    time and the frequency of big mistakes is getting smaller the
    magnitude compensates :-) 

Jeff
Demand Designs
Analog/Digital Modelling & Goldsmithing
http://www.gmavt.net/~jdemand
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