HI all
What would be good homemade fluxes for these? I've read about crushed clear glass for brass. Someone told me borax would also work. Will these work for aluminium? One other thing is, when asked about green sand the counter guy at the foundyr supply said it can be made by mixing bentonite with sodium silicate. I assume the latter has to be in the powder form, as the liquid form is used for cores. Now what I had read was bentonite + silica sand. Since silica sand is used to make sodium silicate, is this usage appropiate?
Any advice thanked in advance
regards,
Mongke