This last sentence is actually my main problem - I am losing valuable printing time but not in trying to save a few bucks - just short of time to do simple tests.x x x
I'm sure you will find you are losing valuable printing time 'saving' money in the screen room.
I am not sure how to answer your first question. I warm up the lights for 4 minutes, then remove the cover to expose the screen? I will be exposing more than 1 screen with my mercury unit soon so the time for the second screen is my concern. A simple step test should go a long way in finding the "best" time for the second screen (if it won't be the same as the first screen) but really short of time now and hope to find more time a few weeks soon.OK, I'll try another tactic: How are you measuring your exposure?
I suggest 10 minutes.
As was posted in post #2 - the target spectrum for UV energy is UV-A.... when it comes to this "type" of bulb (meaning a bulb looking bulb and not a tube), what are the ratings we should be looking for?
You say something using the UV-A spectrum, but is there a rating? I mean when talking aquarium metal halides, you can spend a small fortune. What is the range of light we are looking for?
Im sure its a variable, but what makes for a good screen printing photopolymer exposure unit bulb?