Homebrew PCBs

>
> Two completely different mineral acids you are talking about.  Hydrochloric
>  produces Chlorine gas, and I promise it will corrode things in the vacinity.
>  Sulpuric is not as bad about corroding things near it, although take a look
>  at the battery tray in an older vehicle for an example of what it can do.
>  Neither is particularly dangeraos compared to say Hydrofluric acid; it is
>  horrible and very dangerous (etches / dissolves glass, even).

But can battery acid be used as an etchant?
Lez