Homebrew PCBs

On Sat, 06 May 2006 23:27:07 +0200, Leon Heller  
<leon.heller@...> wrote:

>
>
> Try adding some HCl, that should get rid of the sludge. Adding H2O2 will
>
> also help, with the HCl it will convert cuprous chloride into cupric
>
> chloride. Doing that should allow you to use the solution indefinitely,  
> if
>
> you wish. Heating to about 50C will speed things up a lot. I always heat  
> my
>
> FeCl3 etchant by putting the etchant container inside a larger one
>
> containing hot water.
>
>
> Leon


Do not heat any etchant containing HCl. HCl boils at very low temperature  
and large amounts of corrosive gas are released even below that.

ST