ok .. thanks Harvey ..
Does it also change color when it calms down?
When I added more 3% peroxide .. it changed color..
and slowed down the etching process immensely.
Didnt seem like I added all that much either..
--- In Homebrew_PCBs@yahoogroups.com, Harvey White <madyn@...> wrote:
>
> On Sun, 10 Apr 2011 10:57:23 -0700 (PDT), you 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?
>
> The peroxide is going to decompose and release oxygen, that's what you
> see. It will calm down in about 30 days to the point where it doesn't
> want to do much.
>
> Regenerate it by bubbling oxygen through it. It eventually changes to
> a different kind of etchant, takes longer, is a bit more mild in
> terms of action.
>
> Nothing to worry about in the proportions you used.
>
> Harvey
>
> >
> >Randy
> >
> >
> >
> >------------------------------------
> >
> >Be sure to visit the group home and check for new Links, Files, and Photos:
> >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>