Dirty and speckled print is a regular problem for flexo printers. Maintaining clean and consistent print can lead to considerable saving in downtime and reduction in waste


1) Anilox roll with too high volume
2) Wrong ink viscosity
3) Excess dot gain
4) Excess pigment in the ink
5) Ink film too thick
6) Contaminated ink
7) Inadequate pressure setting between printing form and anilox roll
8) Wrong hardness or type of plate/tape package


1) Better aniox screen count and cell volume selection
2) Check ink viscosity and keep inks consistent during the print run
3) Adjust printing pressure to kiss (minimum) impression
4) Try using softer cushion mounting tape
5) Adjust ink strength with balanced extender
6) Reduce ink viscosity
7) Adjust printing speed
8) Check doctor blade pressure is correct
9) Wash printing forms and anilox rolls

Helmut Mathes, troubleshooting defects supplied curtesey of Flexo & Gravure Int''l 2011


Dried ink in anilox cells, can cause significant change in print densities. The FlexoStar laser can clean dried ink from even the smallest cells.

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The advantage of Direct Computer to Print

The advantage of Direct Computer to Print

Fast overall process with a simple digital workflow.

Total digital dot creation controls dot shape, relief depth and dot height

Direct engraving of ITR seamless continuous sleeves

Direct engraving eliminates washout and drying process

Perfect registration of plates and sleeves

'Cal-Kwik' automatic material calibration for engraving Polymer or Elastomer

'Perfect Balance' automatically re-balances the print form for high-speed printing