Homebrew PCBs

gettingalongwouldbenice wrote:

> 
> In the files section are instructions for
> making etchant from muratic acid and hydrogen peroxide.
> 
> Sounds like something interesting to try.
> 
> As I understand it, you stick in the board and the copper goes
> into solution.  You regenerate the solution by bubbling air
> through it.  Ok, so where does all that copper go when you regenerate???
> Thanks, mike
> 
> 
Thats not the full story, the regeneration reaction consumes both oxygen 
(from air) and free hydrochloric acid. Overall it is;

CuCl + O + 2HCl -> CuCl2 + H20