Homebrew PCBs

I mix the acid into the peroxide? Not the other way around?
and do I have to mix slowly? is there heat generation or splattering?
from the mixing process ? 




________________________________
From: Harvey White <madyn@embarqmail.com>
To: Homebrew_PCBs@yahoogroups.com
Sent: Mon, February 21, 2011 8:43:46 PM
Subject: Re: [Homebrew_PCBs] FR-4 Copper Clad and Etchant mix

   
On Mon, 21 Feb 2011 17:29:51 -0800 (PST), you wrote:

>FR-4 doesnt have to be green colored? Correct ? 

I've used black, good for displays, blocks light.
>
>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 .. ??

I've used 4 parts peroxide to 1 part acid.  Don't think it's
absolutely critical.

Harvey

>
>Randy
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