+x Chris Rogers - 2/4/2020 2:55:10 AMNot sure if its a good idea and have no direct experience with doing it to epoxy - but you might look into pressure casting to minimize the bubbles. I know it works for clear urethane and other casting resins and makes incredible bubble-free parts. You could probably do it in a painting pressure-pot. 60-80psi (4-5bar) works great in some situations I have seen but not sure what would help with epoxy... Also, maybe degassing the resin? Good luck!
+x Warren (Staff) - 2/4/2020 5:08:51 PMNot knowing the resin system you are using, it is hard to tell if the resin is at fault or just a change in method needed to get best results.Certainly with our GlassCast range of resins, the sooner to the start of the B-stage of the cure, the less likely you will see a join line between pours (B stage is firm but tacky). Degassing can always help as long as you have a suitable pot life to do it. With organic material you may need to seal it first as the resin can soak in releasing bubbles or have some reaction.
+x Wends151 - 2/4/2020 7:36:46 PM+x Warren (Staff) - 2/4/2020 5:08:51 PMNot knowing the resin system you are using, it is hard to tell if the resin is at fault or just a change in method needed to get best results.Certainly with our GlassCast range of resins, the sooner to the start of the B-stage of the cure, the less likely you will see a join line between pours (B stage is firm but tacky). Degassing can always help as long as you have a suitable pot life to do it. With organic material you may need to seal it first as the resin can soak in releasing bubbles or have some reaction. Thanks so much for your reply Warren. I'm using an epoxy TotalCast. Once it's in the pressure pot, do I not need to leave it in there until it cures?I am looking to get a vacuum chamber as I make my own moulds too. When you say a suitable pot life, how long would that be? My epoxy system starts gelling at around the 60 minute mark so would I still be able to de-gas it?