Ok lots of questions I see The process is basically: sculpt your subject out or whatever medium you want, most use a non-drying clay (vs an air dry clay). Once sculpted, there is basically a flexible rubber mold made of it, which destroys the original piece. A wax replica is now made from the flexible mold and you can retool the wax to make subtle changes but mostly to fix the issues that the molding caused because they mold it in pieces and then put the wax back together. After the wax model is completed, a silica slurry is applied and after 10 or so layers the slurry is baked at 2000 degrees which creates a hard shell and melts the wax out, hence the "lost wax method" as alluded to by someone earlier. Once the shell is empty, molten bronze is poured in and after cool, the shell is cracked off. The foundry artist then go back and buff it up, try to weld corrections on seems, grind etc to get it back as close to the original as possible. Once satisfied, various chemicals and heat are applied to create the different color patinas.
It's a lot of tedious labor involved. I can only do simple molds and waxes. This project was out of my mold building abilities so I paid to have those parts done. It's not cheap !! Now I know why bronzes cost so much retail. I do have another project approximately 90% complete and my first sculpted piece, bobcat face, currently in the bronzing phase. The kudus above were my 2nd actual sculptures and first ones bronzed.
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