Homebrew PCBs

On Wed, 11 Apr 2007 17:46:35 +0200, DJ Delorie <dj@...> wrote:

>
> That reminds me, I still have some sulfuric acid kicking around from
> many years ago.  Is that at all useful in pcb making?

There is an etchant made from sulphuric acid and H2O2 much like CuCl (only  
of course copper sulphate). Sulphuric acid would have some neat qualities  
compared to HCl, but there was some catch making it unsuitable for me,  
which sadly i do not remember. But it is used industrially in some cases.

ST