So, I spent the past few weeks building the light box, a table to print on, et cetera, and now I'm running wedge tests to find the good exposure time. I'm using Ulano 925WR and glass-top exposure box with 40W unfiltered black light bulbs about 5" from the screen.
The screens are 190 Y mesh that were degreased thoroughly. My positives are oiled laser print paper and, for shits and giggles, opaque black coverstock cutouts.
Ulano's specs recommend 288 seconds for 1/1 coating; 12 mins for 2/2 coating.
I'm now on my sixth test run with lots of failure.
The first run I did 2/2 for 12 mins and the thing was like a baked shrinky dink. Nothing washed out. Nothing.
This last run I did 2/2 and stepped 4 to 10 mins with 1 1/2 min increments in between. Progress, finally getting good washout and fidelity to the positive, but lots of "peeling like a sunburn" and blurry or jagged edges.
In between those runs I did some 1/1 coats others 1/2 or 2/2 with varied times from 1 min to 7 min and the same effects, everything from leather to blurry goo.
Sooo....I went to wash out this last run and my whole screen is ghosted. Seriously bad. Both edges from excess emulsion that didn't get scraped perfectly to bits and pieces of the image in the center of the screen. Haven't even had the chance to open a pail of ink yet so this is all emulsion. I reclaim twice, still got lots of gunk. I dehaze like there's no tomorrow and still it looks like crusty disaster.
Any thoughts before I take it and throw it out the window? I've even checked the sensitizer bottle twice to make sure I got it all in and it still hasn't changed inside.
Anyone ever get a bad batch of emulsion or do I just need to burn some sage up in here?