Thursday, March 24, 2011

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.

11 comments:

  1. Hi! Just wanna ask if you tried exposing your emulsion using natural light, i mean the sun. I tried twice and i keep over exposing my screen. What do you think is the ideal time?

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  2. Hi there! Sunlight can burn you a stencil in less than a minute, depending on the time of day and I really do not recommend burning your stencils with it because it's a light that you can't control. Remember light must only touch one side of the screen, if intense light finds its way on the other side then it will surely get over exposed.

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