if you use a fixer additive, it is great on fabric, unless you are printing on darks and have an underbase... it does NOT stick well to the underbase... reds especially, wash out and turn pinkish. white on black = BEAUTIFUL! i have shirts that have been washed over 20 times in hot water and the stuff holds up just as well as any plastisol, only it has a lighter feel on the shirt.
we use it for all our posters as well. it's good stuff! you gotta buy a lot of it to get a good discount tho.
i tried the new pro screen ink stuff... not sure if there is really that much of a difference. it did stay wet in the screen longer... not sure how well it holds up on fabrics.
A local store has a half-decent selection of Versatex ink. Ive used it a few times for smaller shirt runs using "method B" on the label, Ironing the backside. I normally iron the front as well just to be sure. They don't always cure so well though I've had a couple wash out or fade, but the majority hold up well. Does their fixer additive make it air cure? I've been meaning to look into it as spending about 2 minutes ironing each shirt makes me shy away from printing shirts often. Its a nice ink to print with though, very thick, and the super opaque white (346) covers well enough for my needs on everything but red.