core removal with water

Casting | OT: Sandbox YAK
core removal with water

I should add that one of the easiest ways to remove plaster based investment cores is to use a power washer with a high pressure nozzle.    In fact, you can eben get volunteers to play with water and do it for you at times.  Here is Elizabeth at the last Shindig held in Woodstock doing just that.    The outer investment is easier to just knock off at first but then finish with the power blasting especially if the surface of the piece is intricate or has heavy indentation patterns.  One warning though.. once you start go all the way because wetting the soft burned out investment with reactivate it some and allow it to reset up a little and get harder again.  Not much, but enough to notice.   bpfink