[Jewelry making - Article 00803] - Re: [Orchid] Why does my gold BOIL?

[Catherine Ryan]

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    I use either a 7 tip on my Little Torch, or I use the multi-opening
    long tip for my Little Torch, depending on the amount of gold I am
    melting. Then, if necessary, I bump up the pressure on my
    propane/oxygen supply generating a powerful fat blue flame. I add a
    pinch of boric acid to the crucible, which seems to aid a cleaner
    melt.  During the melting process, I rock the crucible from side to
    side as the gold melts, exposing the unmelted central lump. When I
    get a shiny molten bubble shape, moving smoothly around the crucible
    I rock it gradually closer to the lip of the crucible so that the
    colder area of the crucible does not recongeal the bubble, then pour
    in one smooth fast pour into the preheated ingot mold. I rarely try
    to melt more than two ounces at once, so your four ounce melt would be a 
    challenge in any case. Good luck. 


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