Homebrew PCBs

----- Original Message ----- 
From: "Chris" <CSchmuck@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, November 05, 2007 8:19 AM
Subject: [Homebrew_PCBs] New here and a question.


> Hello,
>
> I just joined and have been using ferric chloride to photo etch brass
> sheets to make parts for models. This is a quick rundown of how it
> works:
> http://picasaweb.google.com/ErieChris333/Etching
>
> I have read about using Sodium Persulfate instead of ferric chloride. I
> heard it was cheaper and worked faster.
>
> Can anyone here give me some insight. Does it really work better
> (faster)? and were can I buy it and learn how to mix it?

Rapid Electronics (UK) sells it. I don't think it works any better, and it 
doesn't keep once it is made up with water.

Leon