I have done my fair share of silk screening, (or well, I'd love to do more, but no space for it
) and I've never used plastic film cutouts.
I've used this thing called emulsion, which is photo sensitive. You coat it in this, and put it in a very dark place to dry. Takes maybe 15min (with the sort I've used)
Then you print out what you want to screen on transparent printer paper (you know, overhead paper).
Take out your dried screen and put the transparent paper with your print on the emulsion on the outside of the screen (make sure you have it the right way. You've done screening before so I'm sure you know this ^^) and expose it in direct light. You only need a window really. Can't really remember for how long you expose it, so I guess you'll have to experiment with that one.
After that, remove your transparent paper and wash off the emulsion. It'll come off where it's been covered with ink. (I guess you could also just tape paper cutouts on a screen, it'd have the same effect since it's the emulsion that's not been exposed that comes off).
Then dry, and print away!
for this to work, your screens need to be super clean. You also need a special cleaning agent to clean off the emulsion when you're done.
Good luck :3 silk screening is so much fun!
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