Homebrew PCBs

On Mon, 17 May 2004 13:53:00 +0100, P K <oneNastyViper@...> wrote:

> Hi to everyone.
>
> OK, I am not new to the world of PCB making (using college equipment)
> but now I want to make my own at home, staring simple with a PCB kit from
> Maplin (UK).
> My question is how to treat the ferric chloride I can get (liquid or
> pellets) to get the most life out of it?

How to treat FeCl?
Some would say dump it, never use it ;-).

There are only a few tricks how you can prolong life, acids i think.
and electrolysis...
Not sure myself, not using the yellow from hell.

> Also, how/where can I dispose of used ferric chloride in the UK?
> I have read (on the web, so I am going to take it with a pinch of salt 
> till
> told otherwise) that it is possible to use the liquid as the base for
> concrete, turn it into a lump'o rock and chuck it in the bin?
>
I've read that too... the concrete should neutralize it and the copper
is bound in the concrete then, not sure.

If you want my suggestion: don't use ferric cloride, use CuCl etchant,
it is much less of a pain in the ... .

look in the links section for more information.

ST

> many thanx for your time,
>
> PK
>
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