I don't know if that formula is correct I am curious if it is? What are the
benifits of using that vs ammonium persulfate, that is what I am using in this
youtube video...
http://www.youtube.com/watch?v=trnvlrVq6P0%c2%a0and it works fine.
Please let me know.
Tom
________________________________
From: Randy S. <
rj3819@...>
To: Homebrew_PCB <
homebrew_pcbs@yahoogroups.com>
Sent: Mon, February 21, 2011 8:29:51 PM
Subject: [Homebrew_PCBs] FR-4 Copper Clad and Etchant mix
FR-4 doesnt have to be green colored? Correct ?
Other question .. for making etchant ..
I saw 2 parts peroxide to one part muriatic acid ( 34% hydrochloric acid )
and I saw 3 to mix as well ..
Is it crucial ? I mean I guess the only thing that it would change is the
etching
times .. and the fumes LOL .. ??
Randy
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