How can the white powder appear on the circuit board one day after soldering soldering? What's wrong with the powder? Is there any way to change it? Thank you for your help
I do have a problem now flux to find a friend to help me to do is spray welding flux and rosin flux
There's too much solid content. It should be organic acid plus too much. What's more, the solubility of your active agent and solvent is not very good.
