the other thing i thought of regarding permaset is that, and upon the advice of steve as well, you need to use an emulsion that can cope with waterbased inks. i did some Ts when i first picked up some permaset aqua using a screen prepared with murkami emulsion that i'd always used and after 30 shirts the screen was losing fine detail. anyhow, i'm now working through a pot of dzwr and although much harder to strip off the screen than murkami (i just used an organic emulsion remover on that) the resiliance to ink is excellent and the quality of the screen in terms of fine detail and edges) itself far superior.