Homebrew PCBs

>no reason to move anything!

Don't be silly, motion (agitation) is the key to the success. You 
move your brush up and down the surface to displace used etchant. If 
the surface was moving and your brush was stationary it would have 
the same effect. If both your brush and the surface were moving with 
opposite velocities then the effect would even be greater.

Replace your brush with the bubbles now and you'll see half of my 
point. The other half of my point is that any concentration of 
bubbles in any area of the surface will cause faster etching in that 
area. Moving the surface with respect to the bubbles prevents that 
from happening. And the more chaotic the movement the better.  

Etching in a blender and somehow preventing the board itself from 
being blended/destroyed would probably lead to the fastest etching 
possible. Don't laugh I may just prove this.

--- In Homebrew_PCBs@yahoogroups.com, "Herbert E. Plett" 
<cachureos@...> wrote:
>