red4
Sr Member
I've done 3 tests using 30 milliliters each time (15ml of Part A, and 15ml of Part B). The first mix started to cure right in the cup after about 10 seconds of stirring. The second test was a lot more cooperative, but it didn't give me enough time to burp the mold. I usually shake and squeeze the mold with the resin inside in order to make bubbles escape through the pour spout and ventilation ducts, but the Onyx cured too fast for this. The third test was only slightly less terrible than the 1st; I filled the entire mold in time, but it gelled while I still had the cup tilted. When I demolded that test, the exterior of the resin was solid; but when I snapped off the sprues after a couple hours of curing, the newly exposed areas were soft like gum. They did eventually fully harden after a day.