Homebrew PCBs

As far as performance goes, not much. I use both and cannot tell the
difference except that when s.p. is etching, it may turn a few shades of
colors before finally turning loght blue.
Rick

mumin55555 wrote:

>  hallo!
>
> i would like to know whats the difference between sodium persulphate
> and ammomium persulphate?
>
> thanks a lot,
> mumin
>


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