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I’ve been trying to figure out how much psi I need to get air bubbles out of resin when casting. Does anyone have experience with this? Can anyone tell me what amount of pressure will get rid of air bubbles?

Joachim
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Michael
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    Positive pressure? How are you applying it to the resin? Vacuum is used to get bubbles out in many cases, while pressure only shrinks them – Chris H Feb 03 '20 at 09:18
  • For thin applications, I use a heat gun, but that's to dry the air and put CO2 across the resin to pop the surface bubbles, not for any air pressure reason. – computercarguy Feb 05 '20 at 00:49
  • When applying vacuum to remove air a clear glass like a "bell jar" is useful to see if the air has been removed. – blacksmith37 Mar 06 '20 at 16:08

1 Answers1

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The amount of vacuum pressure required to draw out all the bubbles is likely dependent on the specific weight and chemical composition of the resin you are using. That should be in your resin's spec. sheet or technical data available from the manufacturer.

Or you could just eyeball it like blacksmith37 says.

rebusB
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