[Jewelry making - Article 00137] - Re: [Orchid] Vent holes in rubber molds

[Richard Hart]

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    The best way to apply talc to a mold is to use a double layer of
    material, I like to use an old flannel shirt, put several
    tablespoons in the center of a 5 or 6 inch square, bring all corners
    up and use a rubber band to form a ball of material with the talc
    ball in the center. Just tap this ball on the mold with the vents
    spread in several places, it should leave a light dusting of talc. If
    too much gets on the mold, turn it over and holding by the edge tap
    the end on the mold on a corner of your work bench. One thing that
    has not been addressed is parting lines. My experience is that if you
    do not have the right amount of vents in the right places you will
    have parting lines that have to be removed in wax or metal. The
    parting lines on my waxes are very faint and very easy to remove. 

Richard Hart
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