HELP! Casting issue

[Captain Rob]

I have used Isotope cylinders for years. Most are very close to pure. Guess what they have no alloys. Alloys can become radioactive. DUH!!

This thread is full of supesitions and fear.

I like it leaves a source of lead open for me.

I fully understand how the sheildimg works. I have a Masters degree in nursing and a minor in chemistry. But, the material I had, was not good metal. See the pics please. It came put of the pot like soft serve ice cream, solidified milky and the ingots would break apart with a grainy interior.