Washboard Print

Problem:

Consistent variations appear in the caliper of corrugated substrate, corresponding with the flute profile.

Solution:

Use a sheet that does not have washboarding/fluting.

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Problem:

Plate impression is incorrect.

Solution:

Adjust plate to substrate impression.

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Problem:

Substrate surface finish resists ink wetting and laydown.

Solution:

Consult with local Sun Chemical Representative for additives.

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Problem:

Ink film is too thick for high hold out substrates.

Solution:

Reduce ink film thickness or use a more porous substrate.

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Problem:

Ink film is too thin for stock and the flute tip to flute valley caliper variation.

Solution:

Improve corrugation process. Increase ink film thickness. Change ink formulation for more transfer.

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Problem:

Ink viscosity is too low.

Solution:

Raise viscosity by adding fresh ink.