I am new here and would like some advice on making a mold for vacuforming. I have made a vacuum forming table and have a good heat source but am stumped on how to create the mold. I have very hard natural drying clay sculpts but in my research have come across no one recommending to form right over this. I have seen a lot of people use plaster to create their molds. I was wondering if anybody knew any good methods on how to take a clay sculpt, cast it with whatever material and then pour a plaster mixture into that casting. Any advice would be greatly appreciated. I have looked into Silicone 73-20 but that stuff is far out of my price range and I have no familiarity with it. The plaster I have is Plaster of Paris btw.
Any help will be greatly appreciated
Any help will be greatly appreciated