Homebrew PCBs

The fumes can be reduced a lot by going to CuCl from your HCl H2O2
setup. A lid helps too.

I operate a CuCl etcher in a mechanical shop area with tools and steel
around, and no corrosion. The tank is covered but not airtight.

I did however rust a set of drills next to a container of HCL and H2O2
with much too high HCl concentration, so some care is advised.

An airtight lid should not be used on this etchant, since the H2O2
needs a release or the container may burst.

ST

On Mon, Jun 8, 2009 at 5:10 AM, Steve<steve65@...> wrote:
> How much of the fumes can humans tolerate? Are the fumes harmful? Do
> they damage other stuff they come in contact with? Is it OK to put a lid
> on the plastic etching pan so as to be able to agitate it without risk
> of spilling the etchant?
>
> Steve K8JQ
>