Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: help!!! my ammonium persulphate doesent work!!!!!!!!!!
From: "mumin55555" <mumin55555@...>
Date: 2004-04-12
i tried for the first time to use ammonium persulphate instead of
ferric chloride. i built a nice etcing tank with a heater at about
50 degree celcius and an air pump. i used about 1kg of ammonium
persulphate with 2 litre of water (at the first place i used much
less ammonium persulphate, but when i saw nothing is happening i put
more).
help!!!!!!!!!!!!! i need it very urgent!
thanks a lot,
mumin.