As far as mass production methods go, sand casting is one of the oldest. 3D printing is one of the newest. Dutch design and engineering consultancy Arup has figured out how to combine the two, allowing one to enjoy both the low cost of the former and the physical complexity
If you're making something for yourself and casting it in resin, you can probably live with the inevitable air bubbles that appear in the object. But if you're an industrial designer prototyping something a client's going to see, bubbles are a no-no. That's why professional prototypers like Eric Strebel use
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