An undesirable peripheral outline around the edges of the printed image. There are two halo faults:

  1. If the print looks squashed all around the image;
  2. If the image is squashed only along the lead or trailing edge.


– Too much impression pressure between the plate and substrate;

– Too much anilox pressure;

– Backing tape too thin or too firm;

– Plate dureometer too hard;

– Plate cylinder running out of round;

– Excessive plate grinding.


– Adjust the pressure between the plate and impres­sion cylinder eliminating halo all around the image;

– Adjust pressure between anilox roll and plate roll to eliminate lead and trailing edge halo;

– Remount plates with cushion mounting tape;

– Use recommended plate durometer;

– Plate cylinder may be out of round; have checked for concentricity. (T.I.R.);

– Reduce amount of plate grinding.

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