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Subject: Re: Rejuvenating ferric chloride etchants (was: Darkening laser printer toner?)
From:
"sheldon_mp_cooper" <bigbazinga@...>
Date:
2012-03-20
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