Muskie Tamer Posted April 21, 2016 Report Share Posted April 21, 2016 I'm having problem with microballoons that i baught from alumilite. Im using pressure with my casts, about 40 psi. When i make a cast with the new microballoons im getting 25% shrinkage. I didnt have this problem with my old microballoons, there was a small amount of shrinkage but i could live with it. So my question is does anybody now what brand of micro balloons wont crush under pressure? Quote Link to comment Share on other sites More sharing options...
token12 Posted April 21, 2016 Report Share Posted April 21, 2016 Try contacting smooth-on and ask them about ure-fil 15. I'm not sure if they will crush under 40psi though. Quote Link to comment Share on other sites More sharing options...
jonister Posted April 21, 2016 Report Share Posted April 21, 2016 I would try lowering your pressure and increasing time in the chamber. Do you pressurize and then take out or let them get hard in the chamber? If you lower the pressure and leave them in longer it might help. Quote Link to comment Share on other sites More sharing options...
Muskie Tamer Posted April 21, 2016 Author Report Share Posted April 21, 2016 (edited) I tried dropping the pressure down to 20 and leaving it in longer, it didn't help.i have contacted smooth-on cause that's also the resin that i use. They claim there's won't crush under pressure. I wanted to see what the TU crowd thought first before i waste anymore money on products that don't meet my needs. Edited April 21, 2016 by Muskie Tamer Quote Link to comment Share on other sites More sharing options...
ravenlures Posted April 21, 2016 Report Share Posted April 21, 2016 Just wondering why the pressure, is it the detail in the lure. I mix the amazing casting resin with micro balloons and have no problems. I just let it stay in the mold for 15 minutes. Quote Link to comment Share on other sites More sharing options...
Muskie Tamer Posted April 21, 2016 Author Report Share Posted April 21, 2016 i use the pressure for both small bubbles and for some castings having detail. Quote Link to comment Share on other sites More sharing options...
ravenlures Posted April 21, 2016 Report Share Posted April 21, 2016 Have you considered vibrating the mold as you pour. You can get them on ebay, I got mine from a old football game. Quote Link to comment Share on other sites More sharing options...
TheHammer Posted April 21, 2016 Report Share Posted April 21, 2016 Call Mike Fauple from Alumilite, he is a great guy and will help you with your problem. 800-447-9344 Quote Link to comment Share on other sites More sharing options...
