Paper Packaging

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Poor Ink Coverage

Problem:

Plate impression is insufficient.

Solution:

Increase plate to substrate impression.

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Problem:

Ink film is too thin for substrate characteristics i.e. too rough or porous.

Solution:

Increase ink film thickness by:

  1. Raising ink viscosity.
  2. Decreasing metering of anilox roll; increasing anilox roll volume or reformulating ink for substrate.

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Problem:

Printing plate is too hard.

Solution:

Use plates with a softer durometer.

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Problem:

Substrate surface resists ink wetting and lay.

Solution:

Consult with a local Sun Chemical representative for additives.

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Problem:

Ink is drying too fast.

Solution:

Slow drying with glycol or increase machine speed.

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Problem:

Ink pH is too low.

Solution:

Check and adjust pH (non-pH stable inks only).

*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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