Homebrew PCBs

On Mon, 19 Dec 2005 05:17:39 +0100, Kim Currier <kimcurrier@...>  
wrote:

> HEllo Group...
>
>
> I tried using the toner transfer method, and got the PCB latternt o  
> transfer,a nd had no problems getting the paper off the board.
> HOWEVER...
>
>
> When I mixed a solution of 1 parts of Muriatic acid with 2 parts of  
> Hydrogen Peroxide, I started ectching the board, and it actually ate
> the traces OFF the board! What did I do wrong?
>
>
> Thanks in advance...
>
>
> Kim


What sort of concentrations are we talking here with the wet chemicals?
If it is anywhere near what they are sold here you made a much too strong  
etchant that will eat just about anything ;-)

If there wasn't a violent reaction with bubbles and stuff your etchant  
wasn't too strong and there's a problem with the resist/toner.

ST