Clean the film positives and vacuum frame glass prior to exposure to minimize pinholes.
Exposure is affected by mesh color, emulsion type, coating thickness, lamp type and the age of the bulb itself.
For best results use an exposure calculator to determine the correct exposure time.
Note: The use of film positives that are either frosted or have weak black density can reduce resolution and definition qualities of the coated screen.
Exposure Times
2 coats outside / 1 coat inside on 230 yellow mesh
18 seconds Vastex E2000 High Output LED Exposure unit
30 seconds Vastex E200 LED Exposure Unit
4:14 minutes Vastex E100 Black UV Bulbs 4 ea @ 20w
Washout Image Area:
Gently spray both sides of the screen with cold to lukewarm water, wait a few seconds to allow emulsion to soften then wash print side of screen until image is fully open.
Rinse both sides thoroughly and dry.
The use of a drying cabinet or fans is recommended to dry the screen.
Use a pressure washer on fan spray for developing the screen.