Paper Packaging

Print page

Dirty Print – Dot Bridging

Problem:

Anilox volume is too high.

Solution:

Reduce anilox volume.

______________________________________________________________________

Problem:

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

Solution:

Revise art, screen and plates for press capabilities.

______________________________________________________________________

Problem:

Plate impression is excessive.

Solution:

Reduce plate to substrate impression.

______________________________________________________________________

Problem:

Anilox to plate pressure is excessive.

Solution:

Adjust to reduce anilox impression. Check plate level.

______________________________________________________________________

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.

______________________________________________________________________

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.

______________________________________________________________________

Problem:

Ink is drying too fast.

Solution:

Add slow solvent; increase machine speed.

______________________________________________________________________

Problem:

Printing plate is too soft.

Solution:

Use plates with a harder durometer.

______________________________________________________________________

Problem:

Worn plates

Solution:

Replace plates.

______________________________________________________________________

Problem:

Ink pH is too low.

Solution:

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

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.

Learn About Sun Chemical's Solutions for Paper Packaging