Limitations due to the opaqueness of the print from either laserjet or
dot-matrix printers may be improved on by making 3 copies at the same
time.  Align them to one another, the inked areas won't perfectly align,
and the mask is completely opaque.  You'll get the darkest using blue
#155.  Transparancies limitations will haunt you all the way through your
project, spend the money and energy on a real mask.


Brian Czimback
Cleanroom Operations
Nanobiotechnology Center
350 Duffield Hall
Cornell University
Ithaca,NY 14853
(607)254-8874
[email protected]