Determining Tin content in bar solder

[bigborefan]

Does anyone know of a way to determine the tin content in a 1lb bar of plumbers solder? I know most today have the percentage marked on the bar as in 50/50 or 95/5 but I have some older ones with no numbers on them with the exception of some that has 111 on them.

[montana_charlie]

Read this thread...especially Post #6 http://castboolits.gunloads.com/showthread.php?t=12357&highlight=666
CM

[bigborefan]

Charlie, Thanks for your response. That tread was exactly what I was looking for. Especially on the part that identifies the 111 bars as 50/50 and also the part of using the lead thermometer to determine tin and antimony content.