The ink does not form complete coverage on the surface of print. Random small holes occur in the print. Generally this is a problem caused by poor ink transfer on to the print and has several possible causes and solutions

1 The ink dries on the anilox roller and fails to transfer onto printing forme.
2 The printing form is not transferring ink correctly
3 The ink cannot build a uniform ink film on the substrate.
4 The anilox roller has lost volume due to dirty cells or is worn out.
5 Dirt on the impression cylinder.
 6 Substrate has strong surface variations and rejects the ink.

1 Use a solvent with a slower evaporation and adjust the power of the dryers. Increase the printing speed.
2 Adjust the ink viscosity. Increase the ink film thickness. Increase printing forme to substrate impression. The surface of the substrate may be irregular, pitted or polluted. Check the metering system.
3 Check the condition of the anilox roller and replace if necessary.
4 Clean the impression cylinder.
5 Use softer printing forme or a softer mounting tape. Check the validity of the surface treatment of the substrate.

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


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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