Originally Posted by
marine6680
Flux can not mix with metal, there will never be a mixture of flux and solder.
I still don't understand well a thing: where does all that flux (that you apply with the pen between the connector and the tin) go? does a layer of rosin (or a little residue of it) remain under the tin/lead? if not, why not and how can I be sure that it does not? I can't see under the tin/lead and I can't clean it if it's there.
Originally Posted by
marine6680
There is a reason why solders come with flux cores, flux is good.
...but solder comes with 0%, 1.1%, 2.2% or 3.3%... so why?