Flexographic

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Weak Print Color

Problem:

Ink viscosity is too low.

Solution:

Increase ink viscosity.

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Problem:

Anilox volume is too low.

Solution:

Increase anilox to proper volume.

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Problem:

Sticky-back tape is too soft.

Solution:

Use harder tape for line work to achieve good ink transfer.

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Problem:

Ink is over-extended.

Solution:

Check formula and add fresh ink.

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Problem:

Ink formulation is too weak.

Solution:

Check raw ink formula for proper strength; check to see if ink is re-work and has proper strength.

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Problem:

Substrate is not receptive to ink.

Solution:

Check substrate surface; check for proper film treatment.

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Problem:

Ink is drying on plates or anilox.

Solution:

Eliminate any excess air blowing on plates and anilox; add slower drying solvents.

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Problem:

Ink is kicking-out or settling.

Solution:

Make sure ink is properly mixed, with no settling on bottom or signs of ink separation.

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Problem:

Ink is aged, used, and/or worn out.

Solution:

Refresh ink.

*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 portfolio of inks, coatings, color software and brand color management for flexographic printing.

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