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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Save time, save money

Save time, save money

The only thing you need is a simple digital workflow. Pre-press Rip creates a 1 bit TIFF input for the laser engraver (seamless is possible). The laser calculates dot formation during engraving.