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Subject: Re: Etchant recycling

From: "dkesterline" <desterline@...>
Date: 2003-12-29

Everyday Iron nails, polyethelene container, and the wires weren't in
the solution.

Trick is the coper was on the negative nail, and was just powdery
sludge. I'm no chemist either, but it didn't look like any
electroplating I've ever seen. Besides, I thought the coper should
plate onto the positive electrode?

-Denny


--- In Homebrew_PCBs@yahoogroups.com, "felixdkat2002" <ebay@s...>
wrote:
> not sure what material your electrode needed to be made out of,
> but there are MANY different kinds of nails.... i would advise to
> find your source on the proper electrode and then get a nail that
> matches as closely as possible... if you got some copper on the
one
> nail it sounds like your idea was working, but you may have been
> depositing other chemicals into your etching solution depending
upon
> what the container, wires, and nails were actually made of...
>
> im not a chemist, but i know that these are all factors to
> consider....
>
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "dkesterline"
> <desterline@t...> wrote:
> > Hello,
> >
> > I've been experimenting with toner transfer for a while now, and
> I'm
> > starting to see acceptable results. This group has been a great
> help
> > in my endevors.
> >
> > I read some posts in the archives about recycling (revitalizing
> might
> > be a better word) Feric Chloride etchant.
> >
> > As I read the instructions, using two iron nails as electrodes,
> run
> > about 1 amp through the solution. (more details would have been
> > helpfull)
> >
> > I tried this and my results were less than stellar. The negative
> > terminal collected particulate copper (kinda looked like a
sponge,
> > but just dust, wiped off easily) and the negative terminal did
> erode
> > some (about 1 hour). In the end my etchant looked like brown mud.
> > Then I tried etching with it and it seemed slower than before I
> did
> > it.
> >
> > Perhaps sombody could advise?
> >
> > Thanks,
> > Denny