There are also filaments that can be dissolved - they're mainly used for support structures, but could also be used for 'lost-wax' casting.
From: "cctalk" <cctalk@classiccmp.org> To: "cctalk" <cctalk@classiccmp.org> Sent: Wednesday, December 19, 2018 2:31:02 PM Subject: Re: OT RE: 3D printer $179.99 (today ONLY) (Was: 8-Update On Wed, 19 Dec 2018, Jay West wrote: > Some are casting metal parts by 3d printing molds. Besides printing molds, I have heard that there is now a filament available that can be melted out/away, for a variant of lost-wax [sandbox?] casting.