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

----- Original Message -----
From: "patroclus04" <patroclus04@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, April 07, 2006 8:14 PM
Subject: [Homebrew_PCBs] Re: Will this work? (my first photo-resist PCB)


>
> About your "box", are the sides closed? you use any reflector?

Sides are closed, but not the ends. No reflector.

>
> I got metasilicate, in powder, to prepare 1 litre solution, but it is
> suppose to last for 8 hours only. I can't spend more than $3 (in
> euros, I live in Spain) everytime I need to develop a PCB, and also,
> because that litre of solution is capable of developing 20 boards. How
> can I get rid of this??

That's why I use NaOH. It's so cheap that I don't bother to re-use it,
although it will last a long time. I make up a litre at a time (10 g NaOH)
and use just enough to cover the board in a small container, then throw it
away.

Give my regards to Achilles,

Leon
--
Leon Heller, G1HSM
leon.heller@...
http://www.geocities.com/leon_heller

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