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Results 1 to 8 of 8
  1. #1

    Join Date
    Nov 2004
    Location
    Savannah, GA
    Posts
    11
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    0

    Default emulsion washout issues...underexposed?...

    (keep in consideration i am BRAND new to screenprinting)

    using ulano qtx-1 emulsion, burning at their "calculated" time recommendation with my setup (uv bl light table)...

    design appears subtely, but on washout, what should be solid stencil peels up like little pieces of fruit roll up. does this sound like just underexposure...?...

    thanks

  2. #2
    bradbane's Avatar

    Join Date
    Oct 2003
    Location
    oakland, ca
    Posts
    801
    Comments
    28

    Default

    yep.

  3. #3
    Premium Member
    Join Date
    Dec 2004
    Location
    Kingston Ontario Canada
    Posts
    969
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    3

    Default

    my light table has 8 4' unfiltered black lights (Philips) 2" from the glass. I burn 110 mesh with QTX at 35 seconds and 200 at 24 seconds. With this i get excelent results, though alot of that has to do with the film.

  4. #4
    bradbane's Avatar

    Join Date
    Oct 2003
    Location
    oakland, ca
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    801
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    28

    Default

    what are you using for film? im about to build a pretty similiar exposure unit.


    oh, and how do you coat your screens?

  5. #5

    Join Date
    Nov 2004
    Location
    Savannah, GA
    Posts
    11
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    0

    Default

    im using trans sheets from office depot, made for an inkjet printer... the film has a texture to it on the printing side to aid the ink in adhesion... could this be compliacting things...

  6. #6
    Premium Member
    Join Date
    Dec 2004
    Location
    Kingston Ontario Canada
    Posts
    969
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    I recently bought an Epson 2200 and the Fastink bulk system (the ink that comes with the 2200 is terrible for positives so just get the fast ink and save headaches) I output to 13x18" fast pos films and get jet black positives. Then spray with an artists fixative (NO UV BLOCK!) and you should have excellent postives.

    I have always coated 1/1 and don't have problems with pin holes, I would guess the exposure times would change depending on the coating method.

  7. #7
    Premium Member
    Join Date
    Dec 2004
    Location
    Kingston Ontario Canada
    Posts
    969
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    3

    Default

    I suppose you could use any basic inkjet, i just got the 2200 because of the output size and I got sick and tired of taping positives together for large format work.

  8. #8
    Premium Member
    steve w's Avatar

    Join Date
    May 2002
    Location
    The Meat Zone
    Posts
    15,663
    Comments
    2650

    Default

    New screens?
    Did you abrade them?
    Did/do you degrease?
    "I guarantee, the image will not be fade off and you will be pleasure it too. " - a bootlegger
    We need to print a tshirt "Avoid sucker effect!"-Fabio
    "fudge isn't sharp"-phoondaddy

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