Black ghosting

Discussion in 'HP Indigo Digital Presses' started by jetscreamer, Feb 12, 2023.

  1. jetscreamer

    jetscreamer Senior Member

    Joined:
    Apr 2009
    Messages:
    140
    Location:
    Kenilworth australia
    Hi my indigo 7r tends to ghost the image unless I up the black or double hit it. Changing the bid and/or development roller doesn't seem to help. The calibration wizard seems ok.
    Any suggestions?
     
  2. indigo2015

    indigo2015 Member

    Joined:
    Aug 2015
    Messages:
    60
    Location:
    rome (Italy)
    Are you using correct blankets?
     
  3. jetscreamer

    jetscreamer Senior Member

    Joined:
    Apr 2009
    Messages:
    140
    Location:
    Kenilworth australia
    Yes HP indigo image transfer blankets.
     
  4. indigo2015

    indigo2015 Member

    Joined:
    Aug 2015
    Messages:
    60
    Location:
    rome (Italy)
    I mean correct blankets for the machine u are using? Are there for hpi 7xxx? I only had ghost image when using bad blankets or when having bad conductivity inside ink. Try to reload an old machine configuration.
     
  5. jetscreamer

    jetscreamer Senior Member

    Joined:
    Apr 2009
    Messages:
    140
    Location:
    Kenilworth australia
    I believe they are correct blankets, changing the blanket and pip makes no difference. Tomorrow I'm going to flush and rebuild the ink tank with my cal ink.
     
  6. krukov

    krukov Member

    Joined:
    Oct 2019
    Messages:
    76
    Location:
    IDK
    You should rebuild ink and calibrate optical density and conductivity. Blankets doesn't matter for ghosting even if you will use from 6xxx press.
     
  7. jetscreamer

    jetscreamer Senior Member

    Joined:
    Apr 2009
    Messages:
    140
    Location:
    Kenilworth australia
    Ok ghosting problems solved.
    Pip no
    Blanket no
    Rebuilt ink with calibration no
    Pressures no
    Carbon brushes cleaned (tech support) no
    New bid and development roller bingo!
    Thanks for all the support.
     

  8. krukov

    krukov Member

    Joined:
    Oct 2019
    Messages:
    76
    Location:
    IDK
    You need to know that black ghosting is a known issue for mainly black developer / Bid base. I thought that I wrote it somewhere...
     
Loading...