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Originally Posted by drunken monkey
by hot melt vinyl, are you talking about the stuff that you can get at tiranti's in london (in blue/green and white); the stuff you can simply melt down and re-use?
that stuff takes quite a while to cool and seeing as styrene can warp by just being next to a radiator (or even just boiling water) i wouldn't hold out much hope about it holding it's form when in prolonged contact with the vinyl.
have you though about making a master using something like alginate or even the silicon, then cast a positive then use the hot melt stuff over the new cast?
a bit long winded but saves the original.
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That's the stuff. Have you used it?
I'm thinking that as the parts are going to be set in plasticine to make a two part mold, there should be plenty of support for the part not to warp in any way.