Post #761642 by GROG on Tue, Mar 29, 2016 12:05 AM

GROG has done wax, low fire water based clay--fired and unfired, and super sculpey. Wax takes several pourings before you get all the waxy residue out of the mold. Water based clay works fine, but there's a chance of messing up the original sculpt when you're demolding it. If the clay is wet when you seal it, the crystal clear will be a film and separates from the waterbased clay and is a pain in the ass to get out of the mold. However, it might work if you let the original dry completely before spraying it with crystal clear, but still a chance of messing up the original. Hoever, if you fire it first, then you definitely need to cover it with crystal clear and it separates from the mold fine. Super sculpey also needs to be sprayed with crystal clear before making a mold. GROG hasn't made any plaster molds from oil based clay sculpts because GROG not want oily residue in molds.

[ Edited by: GROG 2016-03-29 00:09 ]