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@whitequark @mmu_man I meant, not vaporizing as in... lots of people think the smoke coming from soldering is vaporized lead and that one whiff will turn you into a mad hatter. But that smoke is primarily vaporized flux.

I heard the fluxes used for lead free solder were more toxic. I'll have to ask my source for clarification.

But I imagine that even vaporizing them at a higher temperature and longer duration if needed for lead free solder it will likely make more toxic fumes, no?