Dirty Print – Dot Bridging

Problem:

Anilox volume is too high.

Solution:

Reduce anilox volume.

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Problem:

Ratio of dot size (print size) to anilox cell count is inadequate.

Solution:

Revise art, screen and plates for press capabilities.

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Problem:

Plate impression is excessive.

Solution:

Reduce plate to substrate impression.

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Problem:

Anilox to plate pressure is excessive.

Solution:

Adjust to reduce anilox impression. Check plate level.

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Problem:

Paper dust from board or pressroom collects in the ink and sticks to the plate.

Solution:

Clean press, plates and environment. Ensure clean sharp slitting and sheeting.

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Problem:

Ink film is too thick for plate screen.

Solution:

Reduce ink film thickness by lowering ink viscosity, increasing ink metering or decreasing anilox volume.

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Problem:

Ink is drying too fast.

Solution:

Add slow solvent; increase machine speed.

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Problem:

Printing plate is too soft.

Solution:

Use plates with a harder durometer.