Homebrew PCBs

You should store it in a covered container, but with a small pressure
relief opening. Like a small hole, perhaps even covered with a piece
of foam rubber to cut down air exchange but let out any pressure.

The H2O2 will continue to decompose, producing oxygen, which can build
up pressure and rupture a container if it can't escape.

Keeping air exchange to a minimum is in your interest because you
don't want HCL fumes in your basement, and you don't want the etchant
to dry out crystallizing the CUCl (although the long green crystals
are quite beautiful).

Another option is to leave it in the etching tank, if you can cover it
with a lid and safely store it somewhere where it can't be tipped over
or accidentally gotten to by children, pets, etc..

Generally speaking glass is better than plastic, I've seen HCl damage
plastics in the long run and small amounts will evaporate through the
material, causing rust on nearby steel parts. This is more of a
problem with bottles of HCl rather than the etchant (where it is
diluted).

Whatever you do, it is highly recommended to put your etchant
container inside a larger vessel that can catch a spill. It is always
possible for a container to break.

ST

On Wed, Jan 6, 2010 at 5:32 PM, nathan_h_tna <nathan_h_tna@...> wrote:
> If I don't dispose of the acid/peroxide solution after just one use, how should I store it? Should I be concerned about storing it in my basement?
>