[Jewelry making - Article 00116] - Re: [Orchid] Centrifugal vs vacuum casting

[Russell]

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>     where did you see the investment mixer for vacuum? Kerr? 

    They are made by Keystone in New Jersey. They have been largely
    displaced I think by motorized mixer/vacuum devices. However, here's
    a link: 

    http://www.dentallabservices.com/index3.htm They're shown at the
    bottom of the page. I saw one on eBay grouped with a Kerr Centrifugal
    caster and a vibrator. I think they are normally held on the vibrator
    while the stirring is going on. My dentist says he just uses the
    vibrator and hand mixes without a vacuum and has no problems! But
    these bowls look like a good idea for small molds and certainly
    wouldn't require a very powerful vacuum pump. 

Russell
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