Paper Packaging

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Uneven Print Color

Problem:

Ink metering system is out of adjustment or damaged.

Solution:

Check, adjust, repair or replace press components.

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Problem:

Uneven color appears across press.

  1. Light to dark from roll parallel.
  2. Streaks from grooved wiper roll.
  3. Streaks from worn doctor blade.
  4. Streaks from warped blade.
  5. Streaks from damaged anilox roll.
  6. Streaks from dirty anilox roll.
  7. Streaks from low ink flow.

Solution:

Optimize colors across press by doing the following:

  1. Parallel all anilox/metering rolls/blades.
  2. Replace wiper roll.
  3. Replace doctor blade.
  4. Reduce blade pressure or replace blade.
  5. Replace anilox roll.
  6. Clean anilox roll.
  7. Increase ink flow through/across press.

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Problem:

Uneven color appears through press variations.

  1. Light to dark from low ink flow.
  2. Loose plate or plate mount.
  3. Roll bounce from gears or bearings.

Solution:

Optimize color through press by:

  1. Increasing ink flow
  2. Re-mount plates or mount to cylinder
  3. Check or repair press as required

Information about Sun Chemical

Sun Chemical offers a broad ink and coating product portfolio with a wide range of capabilities that include inks, coatings, color software and brand color management for paper packaging.

Learn About Sun Chemical's Solutions for Paper Packaging