how to make mold from clay prototype

[Lamboventa]

hi everybody
i am working with chavant industrial design clay and i wonder how can i make mold because if i put wax on it , i cannot wipe the wax off because the clay is kind of soft.
any suggestions

[Brastic]

According to their web page, you should use the harder clay. You might want to call them to see what they say.

[aflo]

I'n not sure what you are trying to do with wax. (car wax?)
I have used pva for mold release and made plaster molds. The problem is getting the fiberglass parts out of the plaster molds. Even with lots of mold release it is difficult.
Any of the Chavant type clays are soft when the temp goes up a little. When cooled they get harder.

[RCRFRAN]

Keep it cool...

make sure you are using sulphur free clay...

Seal the surface....then many coats of high build primer and prepare/sand/wet and dry the surface as if pulling from any other medium.

Just make sure your tooling fiberglass/system does not get too hot with the exothermic process and you will be good to go...

Here in Detroit , moulds are pulled from clay surfaces daily...you will end up sacrificing the clay , so make sure you get it right first time...