well .. used this formula ..
C1V1 +C2V2 / V1 + V2 and got 19% I think ..
Hopefully thats the correct formula ..
Going to use 9% H202 with a 2:1 ratio of H2O2 to HCL
according to the calculator it should be close.
Randy
--- In Homebrew_PCBs@yahoogroups.com, "RJ" <rj3819@...> wrote:
>
> Mixed it . not sure if its exactly 17% ..
> But at a swimming pool supply place you can
> get 35% H2O2 .. and I diluted it with the 3%
> stuff you get in the store ..
>
> Randy
>
> --- In Homebrew_PCBs@yahoogroups.com, "designer_craig" <cs6061@> wrote:
> >
> > Randy,
> > Where did you get your 17% Peroxide?
> >
> > Craig
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "Randy S." <rj3819@> wrote:
> > >
> > > ok .. 17% peroxide ..
> > > 34 % muriatic acid ..
> > > mixed 3 : 1 ..
> > > never seen copper come off a board that fast .. ever ..
> > > did it outdoors .. respirator .. goggles .. gloves ..
> > > anyways.. should the solution be bubbling even AFTER I take the
> > > board out ?? whats it mean .. I put more 3 % peroxide in it ..
> > > calmed it down .. is it safe?
> > >
> > > Randy
> > >
> >
>