Alexandre Guimar=E3es wrote:
> 	Ok... One almost not nasty chemical :-) Ferric Chloride. =

>   =

I'm a fan of Ammonium Persulphate myself...   dry Ferric Chloride is =

scary stuff, Ammonium Persulphate seems a bit less agressive when you =

have to mix it from dry.  Plus, I really don't like the brown stains =

which Ferric Chloride causes and since it is clear (at least until it =

eats enough copper to turn a nice shade of green if i remember =

correctly), you can tell a lot easier the status of your board.

You definately do *not* want dry Ferric Chloride to mix it yourself....  =

did I mention that already?
> 	Another insteresting aspect here.... I use a small quantity and
> "rub" the board with a sponge ! It takes etching timing down to less than=
 2
> minutes ! It is better explained in this link:
> http://www.pulsarprofx.com/PCB/a_Pages/5_Support/5b_Tips_Tricks/Tips_Tric=
ks.
> html#Anchor-49575
>   =

That is very interesting...  Too bad it only works with Ferric =

Chloride...  Still, I might give it a try.

-forrest
-- =

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