Silver Casting & Moldmaking: Flux Alternatives & Charcoal Use

Question
Hi Peter,

I am trying to make a silver pendant, but I am working in a third world country so many supplies common in the US are not available.

My biggest question regards flux. I have searched around but have not been able to find any borax. I have heard that charcoal is usable, but what is the best way to apply it? Do I just sprinkle charcoal dust onto the silver? Should I try to coat the inside of the crucible too? The crucible is white ceramic and I am told was specially made for melting silver.

Any advice you can offer would be greatly appreciated. Thank you.
-Will

Answer
Will, my apoogies for the delay.
I find it hard to believe that borax is hard to come by. You can likely get it from a pharmacist or have it posted to you.
Regarding Chracoal. This is an unknown quantity to me as I have only ever used it as a heat block.

Sorry, P