I just came back from class in which I did my first casting. We had
problems tonight with the investment not cracking up easily and
coming out of the flasks easily. We had to dig out our pieces which
was a royal pain. Quite literally. My hands are still aching. So I’m
wondering what went wrong? It was a new container of investment,
just opened that night we did the investment (one week ago). We let
the flasks sit out maybe one minute after casting before dunking
them in water. How long should they sit before going into water? I
got the impression that they hurried up the wait time since the
first ones were not coming out well, and they thought that a quick
dunk would shock the investment to help crack it up. I’ve still got
a lot of picking to do to clean up those pieces even after getting
it out. What might have been an easier way to get it out? I was
thinking of something to dissolve the investment, but what? Vinegar?
Any help or insight is greatly appreciated.