Homebrew PCBs

"Dave" <wa4qal@...> writes:
> Thus, think of the design of the nozzle that blows air into the 
> solution.

There's a row of small holes in the block attached to the air hose.

> I wonder if cooling the solution would help, since cooled solutions
> can usually absorb more air than warm solutions?

I heat my solution so it etches faster ;-)

> Would pressurizing the system help?  If it could be taken up to a few
>atmospheres of pressure, would that help the Oxygen dissolve into the
>solution?  (Don't blow up the container!)

It's not about dissolved oxygen, it's about converting the CuCl from the
brown form to the green form.