Homebrew PCBs

Is it any safer in the sense of fumes, etc .. hazmat ?




________________________________
From: Tom Biery <judsquare@...>
To: Homebrew_PCBs@yahoogroups.com
Sent: Mon, February 21, 2011 8:40:42 PM
Subject: Re: [Homebrew_PCBs] FR-4 Copper Clad and Etchant mix

   
    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 and 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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