On Sun, 21 Dec 2003 04:20:12 -0000, Udara Dewamuni <
dewamuni@...>
wrote:
> Hi there,
>
> Do anyone know a coating which i can apply over the PCB after the etching
> process. That coating must be protect the copper tracks by corrosions
> and it should make it easy to do the soldering as well. At the moment I
> am using "Rosin" as the coating. But I dont have a good base to mixing
> it. If anyone know a good base for Rosin pls let me know with any other
> coatings as well. Coz Rosin is not solder-friendly.
>
> Cheers
> Udara
>
I use colophony (resin of pine tree) likely what you have too.
I solve it in laquer thinner. denatured alcohol works too but dries much
slower.
this two solvents give a shiny, laquer like appearance.
Acteone works for solving it but it is not shiny at all.
I often use tha jar with solved colophony to make things easier to solder.
if i want to tin a wire i just dip the end in the resin, then apply the
tin.
you can use tin without fluy here. (or if you have really a ot of wires a
hot tin bath).
If i have to exchange a ic on a older board which can be a bit hard to
solder i also
apply this flux (with a brush). It makes it much easier to melt the tin.
For permanently coating boards i would suggest laquer thinner to solve it.
With alcohol it is a sticky business until it is dry.
Stefan