I had a friend gift me this and will bring me more. I think this soldering bar indicates that it is 50% lead and 50% tin. I tried a image search but only get similar looking items with that description.
I suppose my question is how do Incorporate this into my casting? Do I assume that I cut a piece off knowing that only half is tin and add it to my pot. So a 2 ounce piece would have an ounce of tin?