[Animats]

> As far as I am aware, the act of soldering does not produce any sort of lead vapor or particulate either.

Er, no. Look up hazards of soldering fumes.

[nexttk]

It's the flux / resin also found in the solder that causes that. At the typical soldering temperature of 400 °C, lead evaporates 10 million times slower than ice at -40 °C.