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Subject: Re: [Homebrew_PCBs] Observations on CuCl2 etching

From: Peter Johansson <rockets4kids@...>
Date: 2014-05-13

On Mon, May 12, 2014 at 8:14 PM, kabowers@... [Homebrew_PCBs]

> This paper is a good place to start:
>
> http://techref.massmind.org/techref/pcb/etch/CuCl2.htm

Yes, I found that page, along with this one:

http://www.xertech.net/Tech/CuCl_ech.html

which appear to be the two primary sources on CuCl2. Everything else
I found is more or less a re-hash of what is in those two documents.
However, neither of of these documents mention the high-speed initial
production of CuCl2 (or high-speed etching) when using strong H2O2. I
was able to find very little reference to this on the web, and what I
did find did not seem to cover the experiences I described in my
previous post.

> Also check old posts in this group; LOTS of discussion of the subject.

I did do some searching of the archives, but Yahoo's search isn't the
best and it is painful to try to follow a thread. In the past, I have
used a script to download the complete archives of Yahoo mailing
lists, build sensible message threads, and then search locally, but
unfortunately Yahoo's recent changes have broken that script. In any
case, I was able to find plenty of references to CuCl2 etching, but
was unable to find anything that covered what I was talking about.

-p.