Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "DJ Delorie" <dj@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, June 17, 2008 8:19 PM
Subject: [Homebrew_PCBs] sluggish etchant


>
> I've got a somewhat new tank of HCl etchant that I've used a few
> times, but it's mostly been sitting for a while. It's only pale
> green, but it's emerald not brownish. My test boards (one just
> scrubbed copper as a control) have been in it for 40 minutes now.
> It's warm and the bubbler is running, I even added a shot of peroxide
> ten minutes ago. It etched real quick the first time I used it, when
> it was fresh.
>
> What's the most likely cause of this sluggishness? What could I try
> doing? Things to test?

What concentration is the H2O2 you are using?

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND and FT-857D transceivers
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller