Gridded Membranes

[Rory O'Brien. Biotechnology.]

Hi Y'all,
Does anybody know if it is possible to obtain 'gridded' 
nitrocellulose membranes - ie: normal membrane with some form of 
grid printed or overlaid on top, for the purposes of screening 
libraries and replica plating colonies.
If not, why not ? Seems like a handy idea to me.

Thanks for the input.
- Rory

Rory O'Brien.
National Agricultural and Veterinary Biotechnology Centre,
University College Dublin,
Belfield, Dublin 4.
IRELAND

Ph: +353 (1) 7062815
Fax:+353 (1) 2692016
e-mail: robrien at ollamh.ucd.ie