So why not take some of the pressure off and just 3D-print the thing? No, a cheesy PLA ring is probably not going ... which is then used to make a plaster mold. The mold is fired to melt the ...

have a short list of tips for getting the best results when 3D printing molds on filament-based printers. A mold is put into direct, prolonged contact with a hot sheet of semi-molten plastic.