[Jewelry making - Article 00621] - Re: [Orchid] Casting Cleanup

[Roger Bowersox]

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    I have been using white vinegar in a beaker or glass jar set in the
    ultrasonic to clean off investment. Glass container in the
    ultrasonic keeps the investment off the bottom of ultrasonic. Started
    using the vinegar about 6 years ago when we ran out of divestor. I
    tried different things to remove investment from textured castings
    and the vinegar worked and did not cost much. Does not cause
    oxidation. Last Spring we were out of vinegar and one of the students
    tried Simple Green and water in the beaker. It works slowly. Either
    vinegar or Simple Green/water breaks down and loosens the investment
    and most of it comes off. Sometimes have to do a little scrubbing
    with a brush to remove the last investment hold ons. Have not tried
    just soaking the castings and not using the ultrasonic.
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