In the usa it's around $15-18 per Kg and that make 4 liters of
etchant. enough for about 40-60 smallish boards.
I've bought my last one from Frys for around $14 and you can get it
online for a bit more. here, for example:
http://www.circuitspecialists.com/prod.itml/icOid/2825Phil
--- In
Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon.heller@b...>
wrote:
> ----- Original Message -----
> From: "lcdpublishing" <lcdpublishing@y...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Monday, July 18, 2005 11:36 PM
> Subject: [Homebrew_PCBs] Re: Etchant solutions - home-brew questions...
>
>
> > --- In Homebrew_PCBs@yahoogroups.com, "Phil" <phil1960us@y...> wrote:
> >> The clearest etchant I am aware of is ammonium persulphate (AP). As
> >> it gets consumed, it turns a rather pretty shade of blue but is still
> >> clear enough to see through.
> >
> > Is this (AP) something that you can make from common products or
is it
> > something you purchase for this purpose?
>
> You have to buy it.