At hundreds of hours, you're fine. Honestly, even at thousands of hours, you're probably okay.
Most of the fumes come from the flux boiling way, not the solder itself. (Mind you, I still wouldn't recommend breathing flux fumes. Those are bad in their own way. Adequate ventilation is important!)
Lead is unequivocally bad for you, but the amount that actually enters your system from soldering activities is miniscule.
It's good to minimize these substances in our daily life since they do add up over decades. The problem with leaded gas in cars is that there were just so many cars out there burning the stuff. Duration of exposure and amount of exposure both matter.
That said... do wash your hands after handling leaded solder, especially before eating.
(I used to have a summer job in high school assembling circuit boards for an electronics test company. I easily clocked a couple hundred hours soldering under a magnifying lamp with leaded solder. I'm sure the burns I gave myself from accidently touching the soldering iron itself did more damage than the lead. :P)
> The problem with leaded gas in cars is that there were just so many cars out there burning the stuff. Duration of exposure and amount of exposure both matter.
The difference is not the amount of cars, but that the temperature and pressure in car engines makes lead vaporise, so it can be breathed in.
A soldering iron doesn't reach those temperatures (vaporising the lead is the opposite of what you want when soldering).
Most of the fumes come from the flux boiling way, not the solder itself. (Mind you, I still wouldn't recommend breathing flux fumes. Those are bad in their own way. Adequate ventilation is important!)
Lead is unequivocally bad for you, but the amount that actually enters your system from soldering activities is miniscule.
It's good to minimize these substances in our daily life since they do add up over decades. The problem with leaded gas in cars is that there were just so many cars out there burning the stuff. Duration of exposure and amount of exposure both matter.
That said... do wash your hands after handling leaded solder, especially before eating.
(I used to have a summer job in high school assembling circuit boards for an electronics test company. I easily clocked a couple hundred hours soldering under a magnifying lamp with leaded solder. I'm sure the burns I gave myself from accidently touching the soldering iron itself did more damage than the lead. :P)