[Jewelry making - Article 00922] - Re: [Orchid] Vacuum casting seal problem

[Kenneth Ferrell]

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Fr. George:

    It could be the flasks them selves, if the ends are uneven and/or
    corroded this could cause a leak, Also I'm not sure if they still
    handle it but Rio Grande used to have a product called wax web that
    was used to line the vacuum flasks with prior to investing, it gave
    good flow channels and helped evacuate the gasses. this worked much
    better than using straws and gave excellent evacuation, and it wasn't
    terribly expensive, I imagine Stuller carries a similar product as
    well. If the ends of the flasks aren't smooth, try turning them
    around with the ends on a piece of fairly coarse sandpaper about 220
    grit which is sitting on a good flat surface and keep the sandpaper
    lubricated, (use the wet or dry type sand paper or even a sheet of
    emery cloth. Water or light oil will suffice for a lubricant. This may
    help until you can get new flasks, don't glue the silicone pads down,
    possibly just a light spritz with water on the bottom will help with
    a seal as well. 

    Kenneth Ferrell 

    I saw the sun today; I'd forgotten what it looked like!!!

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