When printed ink fails to form a complete continuous coverage, evident by the random formation of small holes in the printed area.



- Ink dries on anilox and fails to transfer fo plate;

- Ink does not form an even film on the substrate;

- Worn anilox;

- Dirt on impression cylinder.



- Use slower evaporating solvents, decrease dryer capacity. Increase press speed;

- Reduce ink viscosity. Increase ink film thickness. Increase plate impression pressure to substrate. Check pre-treatment of substrate or physicalsurface of substrate that it is not irregular, pitted or contaminated. Check metering system;

- Examine condition of anilox roll for large land areas. Replace if necessary;

- Clean impression cylinder.