Homebrew PCBs

Well, you got me there.
I did a search for the hercules stick and the spec sheet says 
Trisodium Phosphate one of the ingredients. I wonder how much it 
costs.
I've never seen it in Australia. HCl and scrap copper are so 
cheap and widely available, so if you cannot buy the patented 
Hercules Flip Sticks then the copper oxidizing in the tray method 
is probably  worth a shot.

kenneth magers wrote:
> well evidently it is also used to clean soot out and
> is sold by hercules brand name of Hercules Flip Stick
> did a search on google and there it was 4.oz per stick
> nothing in it but cupric chloride.
>  
> 
>