You sure it isn't Sulfuric Acid?
I saw another formula, same chemicals, but used Sulfuric Acid instead of Sulfamic Acid. I just want to try the Ham Radio Magazine formula.
--- In Homebrew_PCBs@yahoogroups.com, "designer_craig" <cs6061@...> wrote:
>
> I have very good luck with elctroless tin. The formula I use came from the September 1971 issue of Ham Radio magazine.
>
> .5g Stannous Chloride
> 2.0g Thiourea
> 3.0g Sulfamic Acid
> 100.0 mL Distilled water
>
> The solution is ued cold, I never tired heating it. It plates up in a few minutes and does a goog job but can't be use as a resist for further etching. The solution does not keep and I always make up a fresh batch for each board making session. I would usually mix up less than 100 mL depending on the size and number of boards I was doing.
>
> Craig
>
> --- In Homebrew_PCBs@yahoogroups.com, Alessio Sangalli <alesan@> wrote:
> >
> > Hi, as I am perfectioning my PCB making, I reached a point where I can
> > do very good boards, but especially if I am making a bigger, double-face
> > one, with huge ground planes, tinning takes simply too much time, and if
> > I want to do it properly, I end up wasting a lot of solder wick braid to
> > remove the excess tin.
> >
> > I've read past messages but I was not able to find a method that is well
> > documented and can be considered a viable solution for a hobbyst that
> > makes only few boards per month.
> >
> > bye
> > as
> >
>