De-gassing RTV Silicon in apressure pot??

[DX-SFX]

Bouyancy is a product of volume x density, i.e. the larger the volume of the bubble, the greater the weight of the heavier liquid material it is displacing and the more the bubble is being compelled to rise. If you want bubbles to rise in resin or rubber, put the mix in a vacuum chambers so that even the smallest bubbles expand and displace a greater volume of liquid thus compelling them to rise more quickly. The liquid, being heavier, wants to flow to the lowest point of the mix thus displacing any bubbles upwards. Pulsing the pressure can encourage bubbles to let go of detail if they're being particularly stubborn about rising. It can also pop the bubbles on top of the mix if the material is viscous and the bubbles aren't overly eager to burst at the surface.

With resin, once all the sizeable bubbles in the casting mix have been removed, it's best to put the casting mix in a pressure pot. This will ensure that any remaining unspotted bubbles left in the mix will be reduced in size until the cast has solidified, at which point, the pressure can be normalised again without fear of the bubbles re-expanding to there pre-pressure pot size.