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FrankB · 15th Dec 2017, 2:14 am

I was casting prosthetics using a blue silicone for the molds and a 2 part colorable plastic for the fangs, knobs, etc.

I did find that temperature made a massive difference on the curing time, and it was recommended putting the item in a vacuum chamber to pull out all the air bubbles.

Not having one, I used an industrial strength body vibrator to agitate the air bubbles out. It worked great. I would think that a vibrating sander strapped to the board that the mold was on would work quite well too.

Casting is difficult under good conditions. My hat is off to you.

15th Dec 2017, 2:14 am	#11
FrankB Heptode Join Date: Oct 2005 Location: Olympia, Washington, USA. Posts: 664	Re: Knob casting experiments I was casting prosthetics using a blue silicone for the molds and a 2 part colorable plastic for the fangs, knobs, etc. I did find that temperature made a massive difference on the curing time, and it was recommended putting the item in a vacuum chamber to pull out all the air bubbles. Not having one, I used an industrial strength body vibrator to agitate the air bubbles out. It worked great. I would think that a vibrating sander strapped to the board that the mold was on would work quite well too. Casting is difficult under good conditions. My hat is off to you.