[Jewelry making - Article 00787] - Re: [Orchid] Investment cast and torch

[Aaron A Tracy]

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>     I use aceylene entirely, and 80% of my business is platinum - I
>     have no problems related to gas 

    I had to learn the hard way about Pt and Acetylene, it was all I had
    when I first started and I have some scrap that is really brittle
    and does not form well without breaking, but I did have some that
    turned out fine and no problems, I was also using a graphite
    crucible, (Big No No) but hey that is how you learn with no one to
    teach you. But I found that if I used a really heavy oxidizing flame
    it would turn out fine, it is a minimal amount that went bad and I
    think it is because I did not to that. 

    That is my take on the whole Oxy/Acetylene thing, it does
    contaminate, but you can get it to work too. 

Aaron A Tracy


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