I'd like to produce a ceramic piece with a relatively complex shape and would like to use a process like lost PLA casting, but with slip.  I'd 3D print a positive in PLA, cast a negative mould around it, burn out the PLA in a low temperature kiln, and slip cast using stonewear slip.  Then comes the hard part: this would be a one-piece mould that would be broken apart to remove the cast piece, but I doubt greenwear would survive the violent demoulding.  Can I bisque fire the piece inside the moul