Any one have experience with making silicone moulds?
My plan is
Use expanding foam to make a positive mould, shapped by hand
Use positive to make a Silicone negative mould
Use silicone mould to pour and create a poly (hard plastic) positive form
Does anyone know if the expanding foam will hold up to the negative mould process? Should I use some other material (easy to shape by hand, using file's and knife, to make the original negative?
My plan is
Use expanding foam to make a positive mould, shapped by hand
Use positive to make a Silicone negative mould
Use silicone mould to pour and create a poly (hard plastic) positive form
Does anyone know if the expanding foam will hold up to the negative mould process? Should I use some other material (easy to shape by hand, using file's and knife, to make the original negative?