Resin Addict Forum

Well, it would seem that my garage is totally the wrong environment for Vacuum casting.

In the summer when I first got my kit, temperatures were 25oc with 90%+ humidity

Winter has set in now so it will be really difficult to keep my garage above 15oc while I'm in there. Plus with all the rain we have been getting in the UK, I'm pulling 2-5 litres of water out of the air each night with my dehumidifier!


No wonder I get foaming resin and trouble with curing.

I do have a halogen cooking pot that I bought for curing minis sculpted with Fimo, I will pop some resin in there at 30oc or so while it cures and see what happens

I am also on the south coast of the UK (Portsmouth) and have had some of the problems you are exhibiting but nothing like as bad. My current workshop has a leak in the roof above the casting table and I'm still putting out saleable casts. S-C305 and various silicones.

Hi Fleafa, your only about 25 miles from me (Felpham, Bognor Regis).

And yeah it is extreme. I have been resin casting for about 8 years now and white metal casting for 12 years before that, just for myself. I only encountered the problems seen in the pic when using the Vacuum chamber...A problem that does seem to be more pronounced when I use a pigment in the resin. Also the parts I make are quite large, which dosen't seem to help. I did just get some perfect casts out of a new mould without using the chamber, or adding pigment to the resin. So there is hope I think

What pigment have you been using?

So-strong pigment. Recommended for use with smooth-on products.
http://www.benam.co.uk/products/plastic ... ng-9-pack/

I am baffled!

So actually you two could meet up and could try to work out the problem together it's it keeps persistent.

I'd be open to such an idea in the new year. Crazy busy before then
Sounds like you have more experience than me, anyway.

What power is the vacuum pump? That and no pressure would explain the fine bubbles to me. I have no experience with the anti-foaming additive.