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2005-12-11 by electrophilip
Hello, is there a way of working out the strength of ammonium persulphate, I have been using about 5 tablespoons per litre of water, I have the temperature as hot as the hot water cylinder will supply and it takes about 15 minutes to etch. Are there any plans around for a small spray etching setup or could someone point me in the right direction for what sort of pump to use. Regards Philip
2005-12-11 by Leon Heller
----- Original Message -----
From: "electrophilip" <electrophil@...> To: <Homebrew_PCBs@yahoogroups.com> Sent: Sunday, December 11, 2005 11:56 AM Subject: [Homebrew_PCBs] Etching (time,strength,machine) > Hello, is there a way of working out the strength of ammonium > persulphate, I have been using about 5 tablespoons per litre of water, > I have the temperature as hot as the hot water cylinder will supply > and it takes about 15 minutes to etch. Are there any plans around for > a small spray etching setup or could someone point me in the right > direction for what sort of pump to use. When I used ammonium persulphate many years ago I used to add a little salt, that speeded it up a lot. Only problem is that chlorine gas is released, which is rather toxic. Leon --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]