Paper Packaging

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Weak Print Color

Problem:

Too much water in the ink due to water in the press station, or operator error.

Solution:

Replace ink or add fresh ink. Repair station to drain wash up water. Measure amount of water added to ink.

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Problem:

Anilox roll is worn or dirty.

Solution:

Clean or replace anilox roll.

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Problem:

Ink viscosity is too low.

Solution:

Add fresh ink to raise viscosity.

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Problem:

Ink film thickness is too low.

Solution:

Increase ink film thickness by:

  1. Raising ink viscosity
  2. Reducing metering of the anilox roll
  3. Increasing anilox roll volume
  4. Adjusting ink for more transfer

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Problem:

Plate impression is incorrect.

Solution:

Adjust plate to substrate impression.

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Problem:

Ink does not contain enough color.

Solution:

Consult with a Sun Chemical representative.

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Problem:

Printing plate is too hard.

Solution:

Use plates with a softer durometer.

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Problem:

Plates are glazed or dirty.

Solution:

Clean or replace plates.

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Problem:

Substrate surface resists ink.

Solution:

Consult with a Sun Chemical representative.

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Problem:

Ink formulation is incorrect.

Solution:

Consult with a Sun Chemical representative.

*The solutions provided from the troubleshooting guide are general in nature, please contact or your sales or technical representative to discuss specific issues.

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.

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