Homebrew PCBs

Stefan Trethan wrote:
> The etchant will only keep as long as it is regenerated (usually with
> oxygen from H2O2 or air).
> 
> Especially with 3% H2O2 it is said to be hard/impossible to regenerate
> this etchant as it adds too much water in the long run.

I thought we also said the bubbler found in many etching tanks does this
function to regenerate the etchant - and anyway in France it seems it's
easy to find 35% H2O2...

Anyway - I like this etchant. I would never use FeCl anymore :)

bye
as