I'm using photocure sr emulsion, nice even coating on screen, 500watt Halogen lamp about 20 (or so?) inches from screen with image held very tight against screen. I'm using tracing paper with ultra opaque acrylic ink to make image, for what that's worth. I exposed one screen for about 10 mins and had horrible washout and ended up just reclaiming the whole screen. Am I underexposing or over? Do I need a thicker coat of emulsion? Thanks, and please remember that I'm, you know, new to silkscreening.