14 replies to this topic

[Steve Milberry]

The last couple times I've poured resin it's been foaming up like this on me. It dosen't seem to be effecting the hardness when it's completely set when this happens but it just seems wierd.

These molds were just filled level with the surface of the molds,,as you can see it's kinda foamed up while it sat.

[FASTBACK340]

Not that I have an answer, but how do you use the resin for home casting? Is it pre-mixed, or do you mix before pouring? The pictures you posted reminds me of pancake batter that's been mixed too well and has air bubbles.

[Jairus]

Production of bubbles means a chemical reaction. You need new materials my friend! Sorry! :cry:

[Steve Milberry]

Not that I have an answer, but how do you use the resin for home casting? Is it pre-mixed, or do you mix before pouring? The pictures you posted reminds me of pancake batter that's been mixed too well and has air bubbles.

It comes in 2 parts which you have to mix 50/50. I'm always very careful when mixing the stuff to get it right.

[Steve Milberry]

Production of bubbles means a chemical reaction. You need new materials my friend! Sorry! :cry:

Thanks Jairus,,I hope you'r wrong though,,,I've only used about 1/4 of it yet.

[Jairus]

The only other variable is heat. Are you casting during a heat wave?
:?:

[Steve Milberry]

It was hot and humid here for the last while. I just did another pour,,we'll see what happens and I'll post the results.

[Jairus]

well steve?

[Steve Milberry]

I put the last batch in front of my AC when it started to foam and it seemed to help,,,it didn't foam up so bad.

I have a batch going now that I put straight into the fridge,,it's just starting to kick now but it looks better than the others,,minimal foaming.

[Jairus]

COOL! 8)

[Steve Milberry]

Here's a shot of the batch set in front of the AC,,better than before,,Not too much foaming,,I'd use these myself.



Here's a shot of the ones I put in the fridge,,Minimal foaming,,looks like I'll be able to keep my waiting customers happy

[Zoom Zoom]

Resin has a relatively short shelf life; as it gets old it's prone to foam/bubbles, probably because it's (I think this is the term, it's late so I apologize if I'm wrong) hydroscopic; it wicks ambient moisture which is probably what's causing the foaming; pouring in a cooler/dryer environment keeps it somewhat at bay as you've seen. Fresher resin and pouring in the dryest/coolest environment you can is recommended. Some people refrigerate their resin to make it last a bit longer. Same w/ unopened superglue.

[Jairus]

(Well, my superglue is now in the frig.)

[Billy Kingsley]

Steve, maybe it has rabies? LOL! :roll:

[jeffb]

resin is a nature, very hydrophillic..it loves to draw mositure out of the air. i was at my resin supplier yesterday, and they have a new mositure resistant resin out. im gonna buy a sample and give it a shot. not sure what brand your using, but i use smooth on. check their website under the new products section and it has all the info.