I pulled off a major haul of casting equipment at a swap meet today. One item I got was a Lyman mag 20 furnace ( for a whopping 20 bucks) it works fine but it had a couple of handfuls of what looked like kitty litter in it. I dumped out the loose contents of the pot. Which was some of the litter and a bunch of badly cast .45 cal swc's and there was still litter in the solid lead in the bottom of the pot. This came to the surface when the lead melted. Iv'e always fluxed with beeswax and I have heard of folks using sawdust but fluxing with kitty litter is new to me. I will say that the molten lead was very clean and shiny. Is this a new development cause Iv'e been casting over 30 years and never heard of it.
Thanks for your input.