Homebrew PCBs

On Tue, 11 May 2004 01:46:29 EDT, <JanRwl@...> wrote:

> Joaquim:
>
> Use lacquer thinner. (I THINK that is amyl acetate?).  Dissolves the 
> "rosin
> flux" as readily as water washes off sugar!

How bad is rosin flux (colophony) really?
I have seen some pretty old boards, coated in colophony, and could not
see any problems.

Of course if you have high impedance circuits it might very well be a 
problem.
Not sure about HF properties either.
But i can assure you it does not do any harm to most circuits and i have 
yet
to see it corrode anything (quite the opposite).

Now, why should i wash it off?
I'd rather coat the whole pcb in colophony resin to protect it from 
corrosion.

ST