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 8:52 PM
Subject: Re: [Homebrew_PCBs] sluggish etchant


>
> "Leon" <leon355@...> writes:
>> What concentration is the H2O2 you are using?
>
> It was the usual 2 parts 3% H2O2 to 1 part 37% HCl. But like I said,
> it's been sitting for a while.

3% is too weak, unless you make up fresh etchant each time. I use ferric
chloride, it's much less trouble.

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