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gunnut1
03-31-2016, 10:17 PM
Hey y'all, I am somewhat new to boolit casting and needless to say, I have some questions.

In the past couple of weeks I have sucessfully cast several hundered boolits. Most if them have been OK but a fair number have not been prefect but they either got shot or got thrown back in the pot. I was using lead of unknow composition so I feel that is part of the problem with the imprefect boolits.


But alas, Mr. Murphy is alive and well. I bought some lead from a guy on one of the reloading groups I blong to on Facebook. He told me the lead was mostly wheel weight. I finally got a chance to day to melt some of the lead and something happened that I would normally blam on heat but I don't think heat is the problem. I fired up the pot and melted three muffins. The temp of the lead never of much over 700 degrees and everything looked fine. Alittle dross but not much. I did not flux the lead. I use good ole beeswax to flux. I did not have time to drop any of the lead to make boolits. I had to leave to meet the XYL for dinner at our favorite Italian place so I turned the thermostat down all of the way and unplugged the pot. When I got home I looked in the pot and there was a dark blue color on top of the now cooled lead. It looked like the lead had been really really hot but I know it never much exceeded 700 degrees because my lead thermometer told me so. I did not see this when the lead was hot.


Here is a picture.

http://img.photobucket.com/albums/v103/kd5day/lead_zpsppnv0gvm.jpg (http://smg.photobucket.com/user/kd5day/media/lead_zpsppnv0gvm.jpg.html)

This is a shot of the cooled lead.

Can anyone tell me what is going on?

Bullwolf
03-31-2016, 10:47 PM
Totally normal, nothing to worry about.

Pure lead tends to turn into blue/purple color when overheated, Tin/pewter turns a somewhat yellow color.

Thought this used to be a sticky post at the top of the Lead and Lead Alloys section.

Gold and purple and blue...Oh My! (http://castboolits.gunloads.com/showthread.php?63550-Gold-and-purple-and-blue-Oh-My!)

http://castboolits.gunloads.com/showthread.php?63550-Gold-and-purple-and-blue-Oh-My!

It's a somewhat long, but good read about lead changing colors.


- Bullwolf

gunnut1
04-01-2016, 01:12 PM
Totally normal, nothing to worry about.

Pure lead tends to turn into blue/purple color when overheated, Tin/pewter turns a somewhat yellow color.

Thought this used to be a sticky post at the top of the Lead and Lead Alloys section.

Gold and purple and blue...Oh My! (http://castboolits.gunloads.com/showthread.php?63550-Gold-and-purple-and-blue-Oh-My!)

http://castboolits.gunloads.com/showthread.php?63550-Gold-and-purple-and-blue-Oh-My!

It's a somewhat long, but good read about lead changing colors.


- Bullwolf


Well, what I have read makes sense. What I don't understand is why it turned blue while it cooled. As I stated, the lead surface was fine with a little dross on the top when I turn the pot off. A few hours later when I got home the top of the lead was blue. And the temp never exceeded 700 degrees.

bangerjim
04-01-2016, 01:45 PM
Like said........perfectly normal. Technicolor pure Pb is good.

Don't worry about the colors you see in the pot or on the ingots. I see everything from silver to gold to blue to purple to reddish. If it did not, it could be Zn!

Cast away without fear or trepidation.

banger

Echo
04-01-2016, 01:51 PM
The blue is lead oxide, formed over the time it cooled down while you were taking SWMBO to dinner. It also forms faster, the hotter the melt, as does tin oxide (gold in color). Flux it back into the melt, and press on...

gunnut1
04-03-2016, 08:35 AM
OK thanks guys. They guy I bought this lead from told me it was mostly wheel weights but he may have been wrong. My lead harness tester is supposed to be here any day and I wil know more about the composition.


Goit a little time today so I think I will cast some 44 caliber boolits!

osteodoc08
04-03-2016, 09:50 AM
As mentioned, perfectly normal

Beagle333
04-03-2016, 10:04 AM
It just might be wheel weights as he said, but mostly stick-on wheel weights instead of clip-on. Those are much softer and contain more pure lead.