Post by billythekid on May 8, 2019 11:00:42 GMT -5
I am using Alumilite White with microballoons to make a casting that is buoyant. I'm using a fairly high concentration of microballoons at 10% by weight of resin (probably around 75% by volume). All the products I'm using are brand new.
I'm seeing a small amount of expansion while the resin mix cures, maybe 10% or so. Is this normal for resin with microballoons or am I getting moisture contamination? I need to keep the weight of the castings very consistent and it is challenging with this expansion.
I did some research and I'm seeing conflicting opinions on this. Some say it's normal when using the microballoons and others say it shouldn't expand.
Post by pezgallo24 on May 28, 2019 21:32:50 GMT -5
I've experienced some resin expansion when adding microballoons and it seemed to correlate with the percentage added. Are you seeing a consistent amount of expansion when mixing the same amount of balloons?
Post by billythekid on Aug 5, 2019 13:42:36 GMT -5
Sorry, I'm just checked this post and saw your response. I ended up getting a dehumidifier which seemed to help a little bit. The expansion is fairly consistent I'd say. On a 140 gram casting, I get variation of 3-5 grams on average. I can deal with that result for the project I'm working on.