700 dot gain on front edge

Discussion in 'Man Roland Printing Presses' started by Alan Spring, Oct 23, 2019.

  1. Alan Spring

    Alan Spring New Member

    Joined:
    Oct 2019
    Messages:
    1
    Location:
    Bristol UK
    Been printing a 4 on carton and the front 2 cartons has dot gain in the first 10mm of the image (cyan screen) making these 2 darker in this area than the back 2.
    Tried different units but had the same issue, any ideals anyone
    Cheers
     
  2. drukman

    drukman Member

    Joined:
    Mar 2016
    Messages:
    19
    Location:
    Bulgaria
    Check the spur gear on the water roller shaft. –ěS inn.
    ...or air coupling
     
  3. turbotom1052

    turbotom1052 Senior Member

    Joined:
    Oct 2008
    Messages:
    768
    Location:
    Vermont
    Are you certain that the blanket packing hasn't bunched up a bit in the gripper area?
     

  4. sergios68

    sergios68 Member

    Joined:
    Jan 2014
    Messages:
    42
    Location:
    Monterrey, Mexico
    Hi Alan,

    Is not clear wich problem you have... do you mean every 2 sheets there are dot gain at the begining of print? or all the printing sheets have dot gain at the edge of the begining of print? please be more precise of the fail description in order to recomend a solution...
     
Loading...