Homebrew PCBs

Rick,

The ferric chloride is dissolving copper into solution. For that reason, I
could not get lighter or stay the same. Put something that's not white into
solution and the solution gets darker.

73,

Todd
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K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
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QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design


On Tue, Feb 12, 2013 at 6:36 AM, Rick Sparber <rgsparber@...> wrote:

> **
>
>
> Leon,
>
> I'll try that today.
>
> Any idea why the ferric chloride is getting darker?
>
> Rick
>
> -----Original Message-----
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Leon Heller
> Sent: Monday, February 11, 2013 6:40 AM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: Re: [Homebrew_PCBs] ferric chloride question
>
> On 11/02/2013 13:06, Rick Sparber wrote:
> > I have been using the same ferric chloride for a while and it still
> > does a fine job of etching my boards. But it has become darker and I
> > see some precipitates forming. Does it just need a little water?
>
> A little hydrochloric acid should remove the sludge.
>
> Leon
> --
> Leon Heller
> G1HSM
>
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