Irregular edges around a print, often undesirable marks made on the image’s trailing edges, generally caused by an excessive build-up of ink.


– Incorrect pressure set up in printing unit;

– Ink drying on plate;

– Improper setting of metering system;

– Uncontrolled ink viscosity;

– Incorrect solvent balance;

– Debris and dust being picked up from the substrate;

– Out of true plate cylinder;

– Static electricity.


– Reset pressure between all rollers;

– Clean plates thoroughly. Speed up press. Slow down drying by adding slower solvents. Ensure ink unit tray covers are in place;

– Reset pressure settings between fountain roll nip and doctor blade assembly;

– Maintain correct viscosity, do not allow to drift too high. Use ink tray covers to improve ink solubility;

– Modify solvent balance;

– Clean off when necessary, lower ink viscosity to lower its tack. Use web cleaning devices when required. Tacky polymers not cured properly during manufacture;

– Check roller is true;

– Use static eliminators. Reduce tack of the ink and clean plate.

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