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  1. #2
    Technologist bford903's Avatar
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    Sep 2014
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    Albuquerque, NM
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    Second test:
    Plasticast Investment
    6hr burnout
    Heavy Castings Mix

    Result: Unusable. Same result as before but less severity. Failure.


    I still think this is a curing issue. I believe there is still uncured resin inside the model causing the temperature differential which causes the model to expand which is damaging the investment.

    I have a few more models in various stages of curing and I'm starting to notice a significant color change as the model cures. The initial color is a light yellowish-green and changes to a almost white color with a tinge of purple (this is noticeable on the first prints). The color change is occurring throughout the model from the outside in. I think curing time should be measured in days not hours.

    Next test will be with Plasticast and mucho extended curing time.

    Anyone know if there's a patron saint of jewelry casting?
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