Dirty Print – Dot Bridging

Anilox volume is too deep for dot size and an excessive amount of ink is metering to the plate

Reduce anilox volume or increase plate dot size

Ink is flooding plate dots due to loose ink metering or worn doctor blades

Check and adjust ink metering; check and replace doctor blade if indicated

Stray air is blowing on plate or anilox

Block stray air; balance dryers to eliminate

Plate impression or plate relief is excessive

Reset plate impression. Eliminate high spots if bridging is localized

Ink is drying too fast

Add slower drying solvents

Ink formula out-of-balance, affects film splitting / transfer

Check solvent blends for Alcohol / Ester balance. For clean printing, the resin structures must have the correct solvents

Ink too tacky

Incorporate harder resin