Yes, because according to
http://www.p-m-services.co.uk/ferric_chloride.htm and
http://artmondo.net/printworks/articles/ferric.htm, the CuCl builds up, while the Fe oxidizes to FeO and precipitates as sludge which can be decanted off.
--- On Fri, 4/2/10, Chris Maness <chris@...> wrote:
From: Chris Maness <chris@...>
Subject: Re: [Homebrew_PCBs] Old etch
To: Homebrew_PCBs@yahoogroups.com
Date: Friday, April 2, 2010, 10:57 AM
If you keep the Ferric Chloride in a container with a lid and add a bit of
> HCl every few months before a use, it will etch PCBs for years if you use
> air bubbler agitation. Better to keep it.
>
That works for FeCl3 too? I thought that was just for CuCl2 solution.
Chris
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