On Fri, 23 Dec 2005 21:43:04 +0100, adicont2 <adicont2@...> wrote:
> > Sorry, I'm affraid I dont understand... A "wedge shape"... > > > > Adrian
The discussion back then was the lower edge of the board etches faster - why? probably because the bubbles hit the lower edge, but then drift away from the board as they rise. If one would put a wedge "guide" there, combined with largish bubbles, that would press them against the pcb all the way.