Homebrew PCBs

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
> >
>