It's been a long time since I did photo silk screening, so I may be off
base here. I vaguely recall mixing the emulsion (comes in 2 parts right?)
and applying to the screen (I still have the alum. squeegee-like tool
around I used). But, I didn't leave it for 24 hours. In fact, I recall
using a hair dryer (on cool air) on it to speed up the drying process. It
seems like it was less than an hour.
My guess from your description, is that your problem lies either with the
lights you're using (I remember using pretty heavy duty photo floods), the
distance of the lights from the screen (I recall it was about 18 inches),
or the length of the exposure (I recall fairly long exposure times...10
minutes or more). Since your emulsion is washing out, it definitely sounds
like its not being exposed properly.
I'd look at one one (or more) of the above factors for solving your
problem. You might try a test strip or sorts...covering sections of your
screen and exposing some areas longer.
Good luck...hope this helps some. If you still have problems let me know.
They do photo screenprinting in our dept all the time and I'll ask our
printmaker about your problem.
>I have been attempting to make a photo (diazo emulsion)direct silk
>screen and have been quite unsuccessful. I mixed up the stuff in
>low light and used a cardboard to run it over the screen--up down
>then turn over and up and down. Then dry for 24 hours in dark. When
>I tried to expose it for 3 min all the emulsion washed right out of
>the screen. The emulsion is supposed to dry horozontally but it
>ended up with little thick drop spots. I didn't have a clue how
>long to expose. Next time I think I'll try 10 minutes, but I really
>hate wasting screens. Does anyone have any expertise in this area???
>Please let me know--I really need someone to whine on!! Sid
CRAIG ROLAND. Associate Professor-Art Education.
Department of Art, FAC 302, University of Florida, Gainesville Florida.
32611-5801. (352) 392-9165 - Art Ed Office (352) 392-8453 - Fax
new email address: rolandc