vac chamber not doing much
Posted: Wed Feb 24, 2016 3:39 am
I bought a vacuum chamber (since I'll need degassed silicone molds for when I get a pressure pot).
I mix up SmoothCast 327, rev up the pump to -29 Hg, turn it off, then let it sit in the chamber at -29 Hg for 7 minutes. Still bubbles!
Strangely, the resin bubbles like it's boiling in the chamber, but it doesn't really rise like I see in videos. Nor does it have that collapsing moment where most of the bubbles disappear.
I mix up SmoothCast 327, rev up the pump to -29 Hg, turn it off, then let it sit in the chamber at -29 Hg for 7 minutes. Still bubbles!
Strangely, the resin bubbles like it's boiling in the chamber, but it doesn't really rise like I see in videos. Nor does it have that collapsing moment where most of the bubbles disappear.