when we switched from SP1400-W back to SP1400 the starlight and that emulsion didn't mix well for us here... we were getting very unpredictable results depending on who the hell knows what... which made us start to look for other emulsions...
We switched to PHU .. it was too fast (160S screens were at 3 seconds! to a solid 7)... so we switched to PHU2... (160S at 12 seconds)... we started getting some weird chatter type breakdown sometimes depending on the shirts, pressure, etc...
we did more research (Ross Balfour from Saati involved)... and found that we were coating screens way too thick.. on S-mesh we found that a single round edge coat on the shirt side was plenty to get us to 18-20% EOM.
After we made that simple change (which has saved us a LOT in emulsion as well), we're now running 1000+ piece discharge runs with PHU-2 (with proper post exposure) with all the easy reclaim of a pure-photopolymer. Honestly couldn't be happier with how it's working out.
JBLUE is right tho on that the Saati PHU emulsions love the sun or post-exposure... after a bunch of testing, I don't even think that the LED units gives the right wavelengths for proper post exposure, as I can put 3 screens on the same long-run job (1 post exposed on the Starlight, 1 post exposed on Saati's 300W lamp, 1 post exposed in the sun) and the best looking screen at the end of the job will be the sun post-exposed one, followed by the Saati 300W one, followed very closely by the starlight....
