OK here goes. I got some lead (sheet lead) from a roofing job, it had a small amount of sealant on the leading edge. I figured to hit it with a propane torch and melt into a can for further processing, this went well. All is good so far, now I put it on low heat and begin a slow melt process. When it liquified I ladled it and came out with large amounts of dross (impurities or whatever its called), this stuff was heavy but not as heavy as the lead so it came to the top. Some of this stuff looked like powder and some held together like metal, I skimmed it out, by volume it was about 15% (might have overstated that) of what I had melted.
Because I am a total novice to this and I was trying to reduce this bulky sheet lead, I only did a small amount to try this. However the lead took on a strange color hue that I am not familiar with. This lead is very soft and what I reduced scratches easily with my pinky nail. See pictures, you will note that the molded lead is still impure and also looks full of moon craters, I'd planned on refining it better later for shotgun slugs and mixing tin or antimony in with some so that I would use it for rifle bullets
I have been reading on this site lots of info in preparation for melting and casting bullets and I obviously have much more to learn. Again this was soft lead that I would have guessed to be almost pure, so I am scratching myself bald on this one.
I hope one of you "Lead Doctors" can set me straight on what is going on and what I must do to fix it.
Thanks,
350Gr