--- In
Homebrew_PCBs@yahoogroups.com, Mark Lerman <mlerman@...> wrote:
>
> As I understand it, the H2O2 is used to provide oxygen to the HCl,
> but using 3% peroxide slows it down because of dilution of the
> HCl. Has anyone tried just bubbling some oxygen through the HCl? Or
> is this just too dangerous to contemplate?? Thought I'd ask before
> trying. <smile>
>
> Mark
>
Air Bubbling works great. I don't put peroxide in it anymore. Sometimes add some HCL from time to time and sometime leave the lid off to reduce the level sometimes. It does take a while for Air Bubbling to get it back to the nice bright Green. I kept my tank on the back porch. It etchs fine even when it was Cold outside.
Ben