I spent some time smelting lead pipe and dental X-Ray lead backers the other day. I cast a few sample boolits outta both just to test for hardness and came up with Saeco 0 for the lead pipe and Saeco 5 for the dental X-Ray backers. I fully expected the zero reading for the pipe, but was somewhat surprised at the 5 on the "backers". So...for those of you that think dental x-ray backers are close to pure lead, you may wanna check them out. I ended up with about 12 pounds of the backers that are now in nice shiny ingots, and that includes the zillion or so that landed on the floor and/or around the pot! I also ended up with about 85 lbs of pure lead from the pipe. I'm a happy camper, and remember...a clean shop, is a happy shop!