On Thu, 11 Jan 2007 18:15:09 +0100, Lez <lez.briddon@...> wrote:
> But can battery acid be used as an etchant? > Lez
Sulphuric acid can be used in combination with H2O2 regeneration in a copper sulphate producing process similar to CuCl. There was some good reason why CuCl is better for homebrew use, but i can't remember it now.