The flux and is toxic, flammable, strong solder you can answer more questions
Very responsible to tell you, toxic,Halogen containing toxic, halogen free, relatively environmentally friendly,Our company is the first company to do soldering in china,So I still know better
On line but not tin solder resist yo problem is written: chemical products lead-free flux on the body is more or less a lot of influences of flux type Oh, see what is flux components, and then to find
