Pressure pots basically force lots of air pressure into a small space and make all the air bubbles in your casting so small that you can't see them. Magic! (Or physics.)
Vacuum chambers suck the air out of stuff. Normally they are used with silicone because they're so thick, but we have crazy customers who use it with urethane rubber and even plastic.
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The Engineer Guy; Nelson A Burke Company, LLC | 1000 Tradeport Blvd. Suite 1011 | Atlanta, GA 30354
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