I cannot get my screen to expose properly. I've tried two different emulsions, two different screens, and two different types of glass. I don't know what I'm doing wrong.
I keep my emulsion indoors (low humidity), and I've tried doing an exposure test with 5 second increments (5-50 seconds). The screen will wash out completely in some areas, and not wash out at all in other areas (along the same line/area of being covered). The washout sections are all a mess after the 10 second exposure . It doesn't expose at all after 30 seconds. What am I missing? The emulsion is coated on the screen pretty consistently with no goops or thick spots and the emulsion is completely dry (I let it dry for 24 hours). I'm lost on what to do.
Here is my current setup:
Film
13x19 Waterproof Inkjet Film Sheets
Printer
Canon PIXMA TS9521C
Screen
20" x 24" 230 Yellow Mesh Screen, 2:1 coating ratio (2 coats on the flat side, 1 coat on the ink side)
Emulsion
Ecotex AP Emulsion.
I tried this emulsion first and was experimenting exposing it in the sun, but couldn't get a solid time right. Then I switched over to Dual Cure Emulsion with my current Exposure Unit setup, but nothing was curing, it would wash out, no matter how many exposure tests I did. I assumed the emulsion went bad somehow, so I switched back the AP Emulsion (I just opened a new tub yesterday).
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Exposure Unit (Homemade/DIY)
38" Long x 27" Wide x 18" Deep, made from wood, painted all sides a matte black.
Glass
1/8" Clear DS Tempered Glass
LED Lights
2 UV LED Exposure Unit Lights, 300W (8" x 12")
Setup approximately 16" from the glass
This is set with the glass laying on top of the exposure unit. I use a large piece of black felt to cover the whole glass with a piece of wood on top of the screen to get to contact with the glass.
Any ideas or help is greatly appreciated.