Homebrew PCBs

DJ,

I mixed it immediately before using from sealed containers. When you 
mix the 4 L, do you keep it in an airtight (covered) etching tank, or 
do you pour it into a container and then back into the etching 
chamber when you want to etch a board? Do you mix it in the same 
proportion I do - 3 HCl +3 H2O + 1 H2O2?? Thanks!

Mark

At 04:36 PM 3/18/2010, you wrote:
>By "Fresh" I meant how long since you'd mixed them.  As for amount, I
>mixed up four liters of etchant and just keep reusing it :-)
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