ArtMetal

The book "Goldsmithing and Silver Work " by Charles Codina
under Under jewelry vessels and ornament has a nice mention of this casting technique..I'd use per-lite or vermiculite..both are minerals you are looking to replace a binder...I would want a binder and some more refractory..make sure this is bone dry before heating..bring up to temp very slowly...Not even close to ceramic shell casting..by todays technique. This is not faster than investment casting,,it is going to take days for your mold to get bone dry..I'm ready to go in a couple of hours..Brad