Casting pewter in RTV Silicone Answered
I want to reproduce a bit of jewellery I have designed in pewter by using a 2-part RTV silicone mould.
By all accounts it is possible but I've run into some problems when sourcing materials.
Most high temperature silicones I have come across state a maximum temperature of 250°C, But pewter has a melting point of around 280°C.
My feeling is that the mould itself will most likely never actually reach 280°C and will probably only be above 250°C for a short period of time.
But I'm wondering if anyone has actually done this and could verify for me. Also as I'm new to the whole process, any other tips are welcomed.
This is the high temp silicone I'm currently looking at.