I want to lost wax cast some small statuary in cast iron - this same item I have previously cast in bronze using the following investment casting plaster (which I still have a 50 lb bag of):
Once the bulk of the wax is steamed out of a plaster investment it is then put in a burn out kiln to remove all traces of the wax and water, and I would have to do the same with the sodium silicated sand, but will this burn out the wax and leave a porous matrix as in the investment plaster ? Obviously any wax trapped in the mould could be potentially explosive when the iron enters so any informed opinions would be appreciated.
AWEM