kaia (npub1c4s…aqv4) <Smartassing>
solder is mostly tin, with a little bit of copper or (if high quality one is used) silver in it.
Additionaly something called rosin, who makes cancer!
https://en.wikipedia.org/wiki/Rosin
(Older solder had lead in it instead of Rosin, but is even worse for enviroment and health)
< /Smartassing>