I have a couple rolls of lead free solder that I don't recall where I got them from. Neither of them has a break down of the alloy. The one roll I find the most interesting is labeled silver bearing solder. The brand is Kester and there's no product number on the spool but it does mention it's for potable drinking water connections. The only useful info on the Kester site says the US plumbing standard is 95% tin and 5% silver.
While I have no shortage of tin bars for hardening up my boolit alloy, I'm wondering if this would be OK to use for that purpose. I'm thinking I acquired it long before I got the 12 or so pounds of pure tin bars that I have...
I have another roll that's lead free rosin core and most likely for electrical use but the label is so dirty on that roll that it's mostly unreadable.
Tony