The tldr is you use 3d printing to make a mold to cast plaster into. Then you plaster cast metal into plaster using metal melted by a microwave. The novel strengths are that you don't get burning plastic like you would with loss plastic method, and you don't have to deal with sand.
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The novel strengths are that you don't get burning plastic like you would with loss plastic method, and you don't have to deal with sand.