[Jewelry making - Article 00109] - Re: [Orchid] Wax Injection unfilling

[Jeffrey Everett]

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>         I am facing problem of unfilling at the time of Wax injection
>     in rubber mold Prongs are not comming as it has to be. When I am
>     using talcum powder, I am getting the better filling. Can any one
>     tell me what are the effects of powder on injection ? Is it wise to
>     use powder ? Is there any alternative to get better filling ? 

    Incomplete fill out in a rubber mold is because of air that can't
    get out of the mold, pockets of air in prong tips, and so on. Talc
    creates a small gap between the two halves of the rubber mold so that
    air can leave the mold. Proper mold cutting along with a fine dusting
    in the cuts helps avoid trapped air pockets. A vacuum injector also
    works nicely in most cases. 

Jeffrey Everett



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