check out gigposters.com
I use super high mesh counts (typically, whatever the highest I have on had). Usually we're just printing posters for local rock bands, so we don't use anything fancy like archival ink. Speedball waterbased ink is easy to use, but has a really flat finish. I've picked up a few pints of nicer water based inks that look better on the paper but they're quite a bit pricier. Plastisol ink looks pretty cool, too, but the paper has a tendency to shrink a little bit when you run it through the conveyor dryer, making registration something of an impossibility.
I use super high mesh counts (typically, whatever the highest I have on had). Usually we're just printing posters for local rock bands, so we don't use anything fancy like archival ink. Speedball waterbased ink is easy to use, but has a really flat finish. I've picked up a few pints of nicer water based inks that look better on the paper but they're quite a bit pricier. Plastisol ink looks pretty cool, too, but the paper has a tendency to shrink a little bit when you run it through the conveyor dryer, making registration something of an impossibility.