Making a mould for casting

[Tweed]

I have a gargoyle made of plaster which is about 10 inches square & 3 inches deep. I want to make a mould to cast a copy made from stone cast plaster (it's for indoors)? How would you go about that? Ta.

[NazNomad]

http://www.paint-scul...utorial-overview.html

[Tweed]

Wow, 2 minutes. Is that a record? Thanks for that Naz but I want to avoid the expensive rubber/silicone based one time use methods. Have considered polymorph pellets (friendly plastic in US I think) which can be reused, but was thinking of some sort of sand/oil based recipe that would not absorb the plaster mix in the short time it takes to set.

[scotman]

Squires have a product called liquid moulding latex which may suit you.

www.squirestools.com

[Lydeard]

once the latex has dried make sure that you do 3 or 4 coats of the latex you can use it as a mould, but if using cement or anything heavy you will need to make a blanket. We used expanding foam to cover around the mould (leaving out the base). Cut the foam in half then you have a stong outer layer to add cement.

[Tweed]

Thanks folks but was hoping for method that can be reused as I'm only going to do one cast each. It would cost around £80 (3 different casts) for the latex and can't really justify that.