Homebrew PCBs

31% HCL, also known as Muriatic Acid. A standard strength I buy at just about any hardware/building supply store. Also available at pool supply stores.


--- In Homebrew_PCBs@yahoogroups.com, DaveC <davec2468@...> wrote:
>
> What strength hcl are you using? The ratio is easily understood, but 
> it all depends on the strengths. (I see you use 3 percent h2o2.)
> 
> Thanks
> Dave
> 
> -=-=-=-
> 
> >I use this technique all the time. I can do a 4X6 inch board in 
> >about 2 minutes. I use 1 Part HCL and 2 Parts 3% H2O2. I make just 
> >enough etchant to cover the board about 1/8 to 1/4 inch and lightly 
> >brush the surface with a foam Paint brush. I etch at room 
> >temperature. Works very well for me.
> >
> >I've also tried 1 part HCL and 2 parts 12% H2O2 but the reaction was 
> >too fast and hot to control easily.
> >
> >
> >
> >--- In Homebrew_PCBs@yahoogroups.com, "tda7000" <Tda7000@> wrote:
> >>
> >>  I see some people get very fast etch times with a sponge and 
> >>ferric chloride...
> >>
> >>  But has anyone tried that method with the HCl and H2O2 solution, 
> >>or the cupric chloride?
> >>
> >  > Or anything else for that matter?
>