"He who marches out of step hears another drum." ~ Ken Kesey
Under exposed for sure. Did you change your coating technique from previous screens? Did you change emulsion?
There are so many variables in this situation. Most will say you need to do a exposure calc test which I have never done. But if you changed emulsion brands you need to find out what times you need to burn. The difference between pure photopolymer and diazo (the kind you mix) emulsion burn times are huge. I can burn a pure photopolymer in 30-45 seconds but the diazo emulsion I use takes between 4-6 minutes. Again alot of variables here.
could it be the humidity? i keep my box at 45% humidity max. also, this orange emulsion by ulano is hard as a rock. (tricky reclaim though, but never any slime) Its probably under exposure but humidity is a factor in naptown during the summer.
Quote from: Prosperi-Tees on September 05, 2013, 02:41:11 PMThere are so many variables in this situation. Most will say you need to do a exposure calc test which I have never done. But if you changed emulsion brands you need to find out what times you need to burn. The difference between pure photopolymer and diazo (the kind you mix) emulsion burn times are huge. I can burn a pure photopolymer in 30-45 seconds but the diazo emulsion I use takes between 4-6 minutes. Again alot of variables here.aahhh...well i had my exposure times set by my mentor and never deviated from that....i used the same burn times for ready mix and diazo....cant say i ever had a problem...or maybe i just never noticed it but that would be impossible...because last night its was VERY noticeable...i was like: "wow.....wth???..why is it so slimey and only on this one side???"