Homebrew PCBs

I was thinking that the copper was the precipitate I was seeing.

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of DJ Delorie
Sent: Tuesday, February 12, 2013 12:39 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] ferric chloride question


"Rick Sparber" <rgsparber@...> writes:
> Any idea why the ferric chloride is getting darker?

What do you think happens to all that copper you etch off?  It's still in
there somewhere...


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