Print Striations

Problem:

Ink is metered with a 2 roll system.

Solution:

Reduce ink on anilox roll by:

1. Increasing metering roll pressure
2. Using a harder durometer crown wipe roll
3. Changing to doctor blade metering
4. Changing ink formulation

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Problem:

Anilox rolls are plugged worn or dirty. Rolls have wide cell lands or coarse screens.

Solution:

Replace or clean anilox rollers. Change ink viscosity or formulations.

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Problem:

Printing plate is too hard.

Solution:

Use plates with a softer durometer.

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Problem:

Ink viscosity is too low.

Solution:

Raise ink viscosity by adding fresh ink.

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Problem:

Printing plates are glazed.

Solution:

Clean or replace plates.

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Problem:

Ink formulation is incorrect.

Solution:

Consult your local Sun Chemical representative.