Homebrew PCBs

On 11/11/13 00:24, benscale160@... wrote:
> You may want to purchase some Copper oxide and add that to your mix. 

Copper (I) oxide (red powder) or Copper (II) oxide (black powder)?

> There are several sources on ebay that sell anywhere from 1/2 lbs to 20
> lbs bags. Copper oxide reacts directy with HCl to produce CuCl. The more
> you add the higher the specific gravity goes. If you overshoot, add some
> water.  

Sounds like a plan. It looks like it can be produced by heating copper
in a blowtorch flame, though getting enough to produce a reasonable
amount of CuCl might take a while (a long while).

I'm toying with the idea of dissolving copper into a small amount of
~36.2% HCl + ~35% H2O2 (to the point of saturation) then adding that to
the etch bath... though once again the question is how much that would
really help.

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