[Jewelry making - Article 00302] - Re: [Orchid] Casting torch ingots

[Barbara Bequette]

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    Richard:  It is important to heat your metal mold to burn all the
    moisture out before pouring your  melted metal into the mold. Your
    can see a color variance on the cast iron molds as the moisture is
    burned off. The least amount of moisture in a mold can be very
    explosive when the melted metal is poured into it. My old instructor
    had a student lose a eye when hot metal drops blew up out of the mold
    due to not heating it to remove moisture. 
    It is surprising how porous metal really is. 

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