Homebrew PCBs

The old saw, "Dilution is the solution to pollution", sure applies to 
Ferric chloride. It is used in fertilizer in dilute amounts. 
Neutralizing the acid and diluting it in 10 or 20 volumes of water makes 
it pretty safe. I can assure you Radio Shack doesn't sell anything that 
exposes them to much liability it's not good for the bottom line.  Here 
they use it in Compost http://www.greenmeadowfarms.com/manuretreatment.htm

The dose makes the poison. Things that are deadly toxins in large 
amounts such a iron, zinc and copper are necessary to sustain all life 
in small amounts.

Using chloride based fertilizers isn't a very good idea in the  long run 
but their cheap.


Gordon

timbomcnuckle wrote:
>
> "> How do you deal with excess etchant?
>
> Pour it down the lavatory."
>
> >>>>WHAT??!! That has got to be the stupidest thing I have heard of
> late!! DISREGARD that part at least!! bottle (not re-bottle) the
> leftovers and PAY for its disposal like everyone else has to do!! no
> wonder things are so polluted with this kind of thought
> process.....not to mention you will be calling over the plumber sooner
> than later, ha ha, good on you! geez.....
> --- In Homebrew_PCBs@yahoogroups.com 
> <mailto:Homebrew_PCBs%40yahoogroups.com>, "Jim Miller" <jim@...> wrote:
> >
> > http://www.theinquirer.net/default.aspx?article=40616 
> <http://www.theinquirer.net/default.aspx?article=40616>
> >
> > thought this might be interesting. there is a link at the bottom to the
> > original article in japanese. if someone can read the original and
> provide
> > more info it might be useful.
> >
> > jtm
> >
>
>