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    Mottling

    feel free to reach out anytime
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    UV offset production

    UV printing has come a long way. Yes, In some cases the ink will cause an allergic reaction on soft skin. You need to be a clean pressman Slobs will get the ink everywhere and it will not dry. The running window is smaller and I can only stress there are no shortcuts. With correct rollers you...
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    Mottling

    Goatneck, where are you located? If in the NY/NJ/PA area, I can stop in at no charge. Email me at [email protected] I am the areas pressroom specialist and deal with problems like this all the time. Take a picture of the printed seet close up and email it to me.
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    Printing long on one side

    If the packing behind the blanket is not at factory specifications, the impression pressure setting will not be accurate. If the blanket is over-packed, the impression pressure must be adjusted accordingly. Heidelberg like most manufacturers is looking for a .006"-.008" squeeze between plate and...
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    Bad plates or a print mechanical problem brain teazer??

    Alois is correct. The black and magenta screen angles were both 45 degrees. Someone had changed the parameters in prepress and for a few weeks had been making plates this way.
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    Bad plates or a print mechanical problem brain teazer??

    I was called to a customer to look into print quality issues on a 5/C 25" press running CTP plates. I was shown a 4/C job that had a brown solid created by 4/C tints. The sheet had streaks and "hot" areas in the magenta and overall looked like crap. Sequence was KCMY. I was shown a 2/C pull of...
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    Impression Pressure

    Read my reply to "Print length" on a different topic.
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    Printing long on one side

    There are a few different ways to check for print length problems. Alois and Erik are both correct. Remove the blanket and check the plate to blanket cylinder bearer pressures by tapping a thin film of ink on the plate cylinder bearer and put the unit on impression. Thin ink film should transfer...
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    Printing long on one side

    How warm is warm red?

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