PF1 Premium Black Flux for Gold
Our own special mix without lead (no cupelling necessary) and consisting of 4 main ingredients:
Sodium Tetraborate, Sodium Carbonate, Silica and Manganese Dioxide.
This flux is especially good for melting Karat or pure gold with your Kwik Kiln and delivers a beautiful, shiny finish to your gold without sticking. Good for smelting ores and melting precious metals in all GPK Kilns and others.