Homebrew PCBs

I use Edinburgh etch in my heated bubble tank, <http://www.megauk.com/pcb_processing_tanks.php> they doa hobby version too, < http://www.megauk.com/hobby_equipment.php> 

The etch seems tospeed up the more you use it and the older it gets.
I was given the tank with its faulty control system (it had been etched as well). I built a newone in an IP67 box with electronic temp control.

Malcolm
 
I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.


________________________________
 From: sheldon_mp_cooper <bigbazinga@...>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Tuesday, March 20, 2012 7:02 PM
Subject: [Homebrew_PCBs] Re: Rejuvenating ferric chloride etchants (was: Darkening laser printer toner?)
 

  
Here's a guy whose rejuvenation chemistry has allowed him to use the same ferric chloride etchant for four years (watch that chlorine gas, though):

http://www.qsl.net/iz7ath/web/02_brew/14_howto/02_clor/index.htm

BTW, has anyone ever tried this (add citric acid to etchant)?:

FERRIC CHLORIDE AND THE EDINBURGH ETCH

http://www.lawrence.co.uk/acatalog/etch.pdf


 

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