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Re: gEDA-user: PCM making methods - was - Re: alarm clock update

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Subject: Re: gEDA-user: PCM making methods - was - Re: alarm clock update
From: John Griessen <john@xxxxxxxxxxxxxx>
Date: Wed, 12 Sep 2007 13:47:02 -0500
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Christoph Lechner wrote:

> So you simply mix a HCl/H2O2 etchant the usual way. When you begin to
> use the etchant, it's bluish.

No.  Yellow-green for full etching strength.

  After some time (and some PCBs) it becomes
> green. Dark green, and when loaded with copper, black.


So when it's green it's CuCl etchant, isn't it???
Pretty much.

John G
-- 
Ecosensory   Austin TX



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References:
- gEDA-user: alarm clock update
  - From: DJ Delorie
- Re: gEDA-user: alarm clock update
  - From: John Griessen
- Re: gEDA-user: alarm clock update
  - From: DJ Delorie
- gEDA-user: PCM making methods - was - Re: alarm clock update
  - From: andrewm
- Re: gEDA-user: PCM making methods - was - Re: alarm clock update
  - From: DJ Delorie
- Re: gEDA-user: PCM making methods - was - Re: alarm clock update
  - From: John Griessen
- Re: gEDA-user: PCM making methods - was - Re: alarm clock update
  - From: andrewm
- Re: gEDA-user: PCM making methods - was - Re: alarm clock update
  - From: Christoph Lechner

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