Shirty/HOWTO

Notes from screen printing testout session 23.06.09:

• Material bought from Wöco:
  • FIXME
• Sensitize emulsion:
  • Fill up the small sensitizer bottle with water
  • Add to the box with emulsion
  • Stir well
• Coat screen with emulsion
  • Do this away from bright light or sunlight
  • Use the "squeegee" to coat the screen with emulsion
  • Do this from both sides repeatedly to get an even coverage and an even surface as a result
• Dry the coated screen (this will taka 30-60 minutes)
  • Place horizontally in a _dark_ room
  • To speed up, use a fan (occationally using a hairdryer might also help)
• Prepare the design
  • Design a positive 1-color bitmap image (i.e. what you see is where the ink goes)
  • Print on a transparent foil using as dense ink as possible
  • Our printout was not very dense due to a broken/out-of-ink printer
• Expose the screen
  • Place the screen with the flat side down on a horizontal surface
  • Place the printed transparent foil onto the screen
  • Mount a UV lamp lighting downwards with ca. 1 meter distance
  • We used the IR+UV lamp from the Chemielabor. Note! The UV lamp won't work lighting downwards, for some reason. Alternative setup: tape the transparent foil to the screen with _transparent_ tape. Cover the backside with something non-reflective.