Whoa! Foamy Blue Clear Slow

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JBidinger

Member
Joined
Jan 1, 2021
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48
Location
Minnesota USA
I'm very new to casting blanks but have been around epoxy for a while. Mostly for making scale radio control airplanes. I've never seen this.

Alumilite Clear Slow. New bottles so it shouldn't be old since I ordered directly from Alumilite. Mixol pigments I picked up at Rockler. I used the Red, White, and Blue pigments since I'm _trying_ to make a blank for Woodcraft's Turning for Troops program. Everything looked great until about the 9 minute mark and I noticed that the blue was a little more bubbly than I expected. By the 10.5 minute mark it was foamy. I poured the blank anyhow and put it in the pot but I'm sure it's ruined.

Resin was at 95f when I poured it. Neither the White or the Red did this. The resin was mixed in a larger cup before being split in 3.

Do you think the Blue just hates Alumilite? I used the same pigments yesterday with Amazing Clear Cast and it was fine though I used less of the Blue.
 

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JBidinger

Member
Joined
Jan 1, 2021
Messages
48
Location
Minnesota USA
Update. It is the Mixol dye. I made a small batch with all new, never used cup, stir stick, etc. and it started to foam at the 11 minute mark.

Soooooooo, I guess don't buy this stuff for Alumilite. I'm off to order some Alumilite brand...
 
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