barbquebutt
Active Member
Anyone ever used expanding foam for mold making?
I want to reproduce an old vacuformed Christmas decoration that has seen better days, so I'd to make a buck from it to form a new one, but I don't want to put anything dense/heavy like clay or plaster on or in it for risk that it might misshape or crack the original. I was thinking that expanding foam would shape well around the front without putting pressure on it, and then I could pull the original, coat the mold with some release agent and pour some plaster to make a positive for vacuforming.
The foam mold would pretty much only have to survive long enough for me to pull a positive from it.
So is it crazy enough to work? Or does anyone have any better ideas?
I want to reproduce an old vacuformed Christmas decoration that has seen better days, so I'd to make a buck from it to form a new one, but I don't want to put anything dense/heavy like clay or plaster on or in it for risk that it might misshape or crack the original. I was thinking that expanding foam would shape well around the front without putting pressure on it, and then I could pull the original, coat the mold with some release agent and pour some plaster to make a positive for vacuforming.
The foam mold would pretty much only have to survive long enough for me to pull a positive from it.
So is it crazy enough to work? Or does anyone have any better ideas?