Screen Printing Start-up : 1st Step Test

My bike repairs are done. Had it tuned up, the oil changed, new spark plugs, oil filter, air filter, lubed cables and chains, plus the pick-up charge - a whopping P6,500! I hope my parents would reimburse.

Anyways, I did my first step wedge test tonight. This time I had my pattern printed on tracing paper. I did 12 different exposure time lengths, moving the blocking paper every 20 seconds until I have a longest exposure time of 4 minutes. When I removed the film there's not even a hint of the pattern on the emulsion and that made me nervous. I took the screen out and hosed it. Nothing showed up after 5 seconds of washing, then suddenly parts of the stencil started to appear and it got me excited. Finally a spark of hope!
So the parts that are exposed for 20 seconds to 3 minutes got completely washed out. Areas exposed for 3 minutes to 4 minutes are still not good - edges and corners get washed off. I'm gonna make another test soon. This time with starting at 3 mins 20 secs of exposure time up to 7 minutes.