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  1. #1

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    Default my emulsion is ripping....

    I started doing my tests to determine my exposure time... and im pretty sure i have my perfect time because my screen doesn't feel slimey (which indicates that it is underexposed) and because the letters are sharp.

    Is it because i'm applying my emulsion unevenly or too thinly ?


  2. #2
    loco's Avatar

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    Is the edge where's is coming off the edge of your film?

    -loco

  3. #3
    Casey Burns's Avatar

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    there's a bunch of factors ...
    are you coating both sides of the screen?
    is the emulsion completely dry before exposure (several hours is ideal, if not over night ... also depends on humidity and temperature where drying)
    are you exposing long enough?

  4. #4

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    yea i think it started from the edge... because in the picture you can clearly see a straight line (on the left).
    At the same time, after exposing my screen, I noticed that the emulsion was darker near the edges... and lighter in the middle.

  5. #5
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    Andymac's Avatar

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    uneven coat, not deagreased, not dry when you coated

    could be a few things.

    were you wearig your screenprinting gaunch?
    Andymac

    services www.squeegeeville.com
    equipment www.tmiscreenprinting.com

    Todo es empezar.

  6. #6

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    Quote Originally Posted by Casey Burns View Post
    there's a bunch of factors ...
    are you coating both sides of the screen?
    yes.

    Quote Originally Posted by Casey Burns View Post
    is the emulsion completely dry before exposure (several hours is ideal, if not over night ... also depends on humidity and temperature where drying)
    it dried for at least 6 hours. the emulsion drops (on the frame) weren't 100% dry but the screen was dry.

    Quote Originally Posted by Casey Burns View Post
    are you exposing long enough?
    i did 8.5 mins with a 500w work light from about 30 inches away from the glass.

  7. #7

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    Quote Originally Posted by Andymac View Post
    were you wearig your screenprinting gaunch?
    whats a gaunch ?

  8. #8
    loco's Avatar

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    If you know that all them prep work to your screen is correct. I would try more expsoure time. It could also be that your film postive might not have a dark dense back and the clear might be a milky white. If this is the case I would try getting a better film positive.

    -loco

  9. #9
    Casey Burns's Avatar

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    i'd say degreasing and a longer exposure seem to be the next things to try, then.
    and what andy said ... was the screen itself totally dry before you coated it with emulsion?
    what kind of positive are you using?

  10. #10

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    Quote Originally Posted by Casey Burns View Post
    i'd say degreasing and a longer exposure seem to be the next things to try, then.
    and what andy said ... was the screen itself totally dry before you coated it with emulsion?
    to be honest i accidently splashed half of my screen with a bit of water. It wasnt a lot of water less than 15 droplets....so I put emulsion on the other side of the screen, but water might have dripped down.
    Quote Originally Posted by Casey Burns View Post
    what kind of positive are you using?
    I'm using vellum... and yea it looks milkier than usual.

    i'll try using a different film and degreasing it... thanks !
    any chemicals/solvents i should be careful of when buying a degreaser ?

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