I took the easy way out and just bought CuCl2 powder. But if I were to
do it the way you're doing, I would imagine that bubbling air through
the solution would speed the reaction. It would add fresh oxygen
and also agitate the solution - thus flushing the oxidized material
from the surface of the copper wire as it reacts.
An aquarium pump, some tubing, and some airstones can be purchased
from the local pet store for about $10 total.
~Rolan
--- In
Homebrew_PCBs@yahoogroups.com, "grantfair2001"
<grant.fair@s...> wrote:
> Hi Adam- I was not feeling mislead, I just did not know what to expect.
>
> The copper has only been in the acid for 18 hours. The acid still
> looks clear, as it did when I poured it into the water. The copper in
> the air looks much as it did at the time of my last post.
>
> I hadn't measured the room temperature when I wrote the above, so I
> went and did this. The etchant temperature is about 65 deg. F.
>
> As I measured the temperature, before my very eyes on several spots on
> the exposed copper wire a turquoise blue coating appeared. That was
> quite amazing! So I have every reason to believe that things will