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  1. #1
    Join Date
    Sep 2014
    Location
    commack NY
    Posts
    16

    UV inks being matte/dull

    we have been having a problem with our UV inks becoming matte/dull when cured.
    the funny thing is the when we cure them in the unit we print the ink in it loses all the gloss, but if we wait until the EOP the gloss is good.
    this is just the ink, no coating, printed on 18pt sbs, coated side.

  2. #2
    Join Date
    Sep 2014
    Location
    new york
    Posts
    62

    H man are you using the corect powder some powders will take out gloss also if temps in dryer are too high can cause issues call ink suppliers lab and ask

  3. #3
    Join Date
    Sep 2014
    Location
    commack NY
    Posts
    16

    Quote Originally Posted by spikeboy View Post
    H man are you using the corect powder some powders will take out gloss also if temps in dryer are too high can cause issues call ink suppliers lab and ask
    it's UV inks we don't use any powder

  4. #4
    Join Date
    Mar 2014
    Location
    Reno NV
    Posts
    33

    Check your FS with glycol refractometer it should be below 1.8%. The reading comes from the wetting agent (sub) the lower you can get it and still print clean the higher the ink gloss.

  5. #5
    Join Date
    Sep 2014
    Location
    commack NY
    Posts
    16

    AKJ,
    we get the same results when we run the ink as a "dry" solid.

  6. #6
    Join Date
    Mar 2014
    Location
    Reno NV
    Posts
    33

    Have you check the output of the lamps? But I'm thinking its an ink problem.

  7. #7
    Join Date
    Sep 2014
    Location
    commack NY
    Posts
    16

    AKJ,
    we see this happen with every ink we tried, 12 different inks from 4 different ink companies.
    it also has an impact on the gloss of AQ coating over the cured UV inks.
    if you would like more info on the press config, and what we print I would be happy to tell you what we do and how we do it but it's a long story.

    Bill

  8. #8
    Join Date
    Mar 2014
    Location
    Reno NV
    Posts
    33

    Bill
    I have some ideas, but this is how I make my living. Contact me at ajenkins@leduv.org
    I will be working in Farmingdale NY the week of Feb 14-18 so I will close to your location.
    Allen

  9. #9
    Join Date
    Sep 2014
    Location
    commack NY
    Posts
    16

    the ajenkins@leduv.org came back undeliverable.

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  11. #10
    Join Date
    Sep 2014
    Location
    commack NY
    Posts
    16

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