[Jewelry making - Article 01023] - Re: [Orchid] Rough surface on Sterling belt buckle casting

[FRANKGO]

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    I have to agree here on both points. The 1350 is too hot 1250 is my
    max temp and I would try casting around 600-650 for a heavy belt
    buckle. You might also consider placing your sprue so that the metal
    is directed toward the back of the buckle if you have not already
    done this. This allows the most forceful part of the metal delivery
    directed at the back instead of the smooth front. Less turbulance
    means a cleaner casting. You might also add a vent sprue to the
    opposite end of the casting to allow for gas expulsion. I
    always(even when centrifical casting) use vaculiners to assist in gas
    expulsion.. my thoughts. Hope they help. Frank 

 
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