Today was a finishing up day for the 150# of ww I brought home last week. Now it's all in muffin tin ingots. With still a couple hours of day light out I drug out the Lee Pro Pot to throw a few wile I was weighting for every thing to cool down from making ingots. I was using some of the lead from todays work. The out side temp was 40 deg f. When the pot heated up the top of it seemed to be rather "frothy". When I skimmed it off it turned to a rather funky chunky stuff. (See pic., that is from only 1 batch in the Pro Pot) I've never seen this before, nor have I tried to cast with it this cold out. Could it just be that I had wishful thinking that I could cast today? Or could I have gotten hold of some lead with issues? I also had the mold sitting in the pot to heat up with the rest of the mix, now I've got the crunchy crap stuck to the inside of the mold as well. Any ideas???
Nora