poor print quality using Gerber Positive vinyl
I am trying to use Gerber Edge Positive vinyl to print silkscreen positives and I am getting very poor print quality. The banner (solid black GSC-12) has flecks of no color, there are several long streaks running the length of the printed vinyl with no color.
I did change the vinyl family from 220 to the correct one and I set the print as dark as possible. These changes improved the quality somewhat. The streaks went away, but not the flecks. Also, the print density wasn't good enough to stop the UV light while burning screens.
As a last step, I selected the double-print option. The results are close to acceptable.
Most of our work uses 10-12 pt. fonts, so crisp edges and great print density are crucial.
Any further suggestions??