Dirty Print – Halos

Problem:

Entire image is halos.

Solution:

Eliminate entire image halos by:

1. Reducing plate to substrate impression.
2. Reducing anilox impression or checking plate level and mounting.

______________________________________________________________________

Problem:

Leading edge halos only.

Solution:

Eliminate leading edge halos by:

1. Reducing anilox pressure to plate.
2. Checking level and mounting.

______________________________________________________________________

Problem:

Plate wrap has distortion.

Solution:

Remount plate to fit cylinder tightly.

______________________________________________________________________

Problem:

Everything halos

1. Plates are uneven, worn, cupped, glazed or mismatched (slugged).
2. Ink film is too thick.
3. Printing plate is too hard.
4. Ink film applications are uneven due to machine or uneven plates.

Solution:

Eliminate all halos by:

1. Leveling, building up, cleaning or replacing plates or entire mount.
2. Reducing ink film thickness by lowering viscosity, increasing ink metering effectiveness, or decreasing anilox volume.
3. Using plates with a softer durometer.
4. Adjusting ink metering, print and anilox impression, and roll parallel. Or replacing plates.