>the trick is to 'remove' the used etchant off the surface of the
>board as fast as it eats through the copper, really impressive. well
>that's what the bubbles are for, but mechanically wiping is even
>more effective!
While that's the theory, I'm inclined to believe that the better bubble
etchers also use the bubbles to move the board away from used etchant.
In other words the board should be in constant motion and the system
should be bordering on a state of controlled chaos. The last thing you
want is a relatively stationary board amidst an orderly stream of
bubbles even though it seems to meet the theoretical requirements.
--- In
Homebrew_PCBs@yahoogroups.com, "Herbert E. Plett"
<cachureos@...> wrote:
>