Paper Packaging

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Inconsistent Print Color

Problem:

Color inconsistencies appear during press runs due to changes in viscosity

  1. Changes in substrate
  2. Additions to ink in press
  3. Foam

Solution:

Optimize color consistency by monitoring and controlling viscosity.

  1. Control substrate or adjust ink for stock.
  2. Monitor, measure and control all materials added to ink at press side.
  3. Add defoamer properly.

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Problem:

Color inconsistencies appear between press runs due to changes in ink, substrate, run configurations, press conditions, suppliers, machine settings or speed.

Solution:

Optimize color consistency by monitoring, documenting and controlling critical variables of the printing process on each order, thereby allowing reproducible print performance.

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Problem:

Color inconsistencies appear between different press stations:

  1. Differences in applied ink film thickness between print stations.
  2. Changes in ink, press conditions, plates, ink suppliers, operator measurement or machine settings.

Solution:

Optimize color consistency by:

  1. Adjusting the formulation ink to correspond to various station configurations, such as: anilox volume, cell count and condition, metering types, pressures and conditions.
  2. Measuring, documenting and understanding differences, and ensuring that proper materials and procedures are used to minimize the effect of changes in the process.

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Problem:

Color inconsistencies appear during press runs due to changes in pH.

Solution:

Optimize color consistency by monitoring and controlling ink pH (non-pH stable inks only).

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