Yeah, you might be right. My understanding is the bulk of (at least visible) fumes when soldering are from flux, but there are other fumes present. When you're

Yeah, you might be right. My understanding is the bulk of (at least visible) fumes when soldering are from flux, but there are other fumes present. When you're not temperature controlled then you probably have other things melting and fuming up as well though, depending on how deft you are.