Homebrew PCBs

At 08:47 07/04/20, Digest Number 2103 wrote:
>     Posted by: "Adam Seychell" a_seychell@... a_seychell
>     Date: Thu Apr 19, 2007 3:58 am ((PDT))
>
>Len Warner wrote:
> >  >And thats why you label your containers, with poison signs.
> >
> > [snip] small children don't read - but the[y] do recognize shapes and
> > they do investigate many things by putting them in their mouth.
>
>The labeling is for the sake of people who can read and interpret danger
>signs. As for the remaining people, you simply make the substance
>inaccessible to them. This is common sense.

As would be NOT using food containers or other insecure
household containers, if common sense were as common
as its name implies and distributed widely enough to have
reached your neighbourhood in quantity.

> >  >Rather I would like to take it
> >  >to a hazard waste facility and have it properly dealt with.
> >
> > And until you do, I would rather you didn't have any accidents with it.
>
>Your overreacting. Copper as the hydroxide is safer to skin and less
>corrosive than the copper in the etchant form. If one can safely use and
>store a hazardous substance like CuCl2 etchant then I'm sure they can do
>the same with copper hydroxide.

The OP hadn't got to that stage yet.

>Note that, ingesting a shot glass of
>either will likely kill you.

I'm not going to ask which is the more palatable form
nor do I wish to investigate alternative ways of death
or other unpleasant medical consequences.

>Rat LD50 figures:
>sodium chloride   3000 mg/kg
>copper hydroxide  550 mg/kg

That's a 50/50 chance on a very fit rat ;-)

How often do you stake the life of you and yours
on an evens bet?

Do note that there may be chronic effects too,
and a metal burden may be for life - such as it is.

Copper is widely used both as a metal and as a fungicidal
salt, so there is a lot of it about in some parts of our
environment and I agree it isn't generally troublesome.

However...
It is safe as water pipes but not unconditionally safe
as cooking utensils -  it all depends on concentration.

Still, you live a long way from me, so why should I care?
That's what lawyers are for - they care deeply about
what earns them: the next good lunch, or vacation,
or pension plan; but not about who pays for it. Nor can
they repair the collateral damage - only monetarize it.