Homebrew PCBs

I agree with Leon: Ammonium persulphate. One of my favorites. Easy to see the etching process. Nice clear Blue and no real nasty smell etc. Turns darker and more green when full of copper. In dry form last a long time.

I've been low key lately. I want to try out the hydrochloric acid and peroxide enchant soon.

-Lee

--- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
>
> On 23/09/2012 16:23, David wrote:
> > Hi All,
> > Can anyone tell me what this etchant is? I have not seen such before.
> >
> > http://www.ebay.co.uk/itm/1pc-Copper-clad-palte-CCL-PCB-blue-environmental-protection-etchant-200g-/251130218053
> 
> Ammonium persulphate?
> 
> Leon
> -- 
> Leon Heller
> G1HSM
>