What is the correct topic for this discussion?
I have adjusted it to [EE]

I have never heard of ammonium perchlorate. I have heard of and use ammonium
persulfate and sodium persulfate with excellent results. It is very safe. Its
fumes are no where near as bad as ferric chloride and the spent solution is
almost neutral and it does not stain and corrode everything it comes near and
is easy to dispose of.
Rick

"Gustaf J. Barkstrom" wrote:

> Oyvind,
>
> It is ammonium perchlorate.  Its fumes are nastier than ferric chloride
> in my opinion.  But, it does allow one to see the etching process through
> the liquid, unlike ferric chloride.  As always; ventilation, ventilation,
> ventilation.  Oh, and safety googles of course.  Don't take your vision for
> granted. :)
>
> Gustaf
>
> >
> > What is the "Magic White powder" exactly?
> >
> > Oyvind
>
> --

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