Homebrew PCBs

On 03/08/13 19:11, DJ Delorie wrote:
> 
> That's kinda how I did mine.  Just keep bubbling air through it, it will
> eventually turn bright green.
> 

Yep - that certainly seems to be happening. I checked on it a few
minutes ago and it's gone from sludge brown to a fairly bright green.
It's nowhere near see-through like you see on Adam Seychell's site, but
it looks like a liquid solution of a copper salt at least. No doubt I'll
have to adjust the acid concentration, but for now it's one step at a time.

I noticed the copper wire sat next to the tank has oxidised so that's
back in the tank. I'll see what happens there. At a guess, the oxidation
was CuCl or something like it - a bright blue/green powdery coating on
the plain copper which was easily rubbed off.

This is starting to get interesting :)

Thanks,
-- 
Phil.
ygroups@...
http://www.philpem.me.uk/