I have read conflicting research regarding the potential for Lead fume generation during, what the industry terms, soft soldering (temps below 842F(450C)). I understand lead has a vapor pressure of 1mmHg at ~973C, a melting point of ~621F (327C), and a boiling point of 3182F (1750C). The solder used is ~60/40 tin/lead ratio. If any of you could provide some objective evidence/data to either support or deny the claim that soldering at these temps will not generate lead fumes i would greatly appreciate it. My background in Industrial Hygiene is limited however more so due to lack of equipment. I am familiar with the potential health effects of lead inhalation/ingestion and the aliphatic aldehydes associated with the vapors from the colophony. My question is aimed at just the potential for Lead fume generation. Any responses are welcomed, thank you.