Homebrew PCBs

Len Warner wrote:
> 
>  >And thats why you label your containers, with poison signs.
> 
> Unless the folk in your neighbourhood are exceptionally gifted,
> small children don't read - but the 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.


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

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

Adam