If you're talking inkjet negatives, then Pictorico OHP is your best choice for UV sensitive printing; Pictorico Photo Gallery High Gloss White Film is better for making negs to be printed on Silver Gelatin.
If you don't already have the "Inkjet Negative Companion" supplement to my book, it'd be a good thing to get. It not only covers the latest inkjet printers but includes a Photoshop Template that semi-automates the negative-making process. You can learn more at the following URL:
And (sorry if this is sounding like a sales pitch) on Sunday February 6, 2005 I'll be officially opening www.TinyTutorials.com where I'm offering short 4-7 minute Quicktime videos of Photoshop techniques. They will be priced at an affordable $3 each, with one free for every four ordered. Check it out on
Hope this helps!