Dirty Print – Fill In

Plate impression is excessive

Reduce plate to substrate impression

Plates are uneven, worn, cupped, glazed or mismatched (slugged)

Level, build up, clean, replace plates or entire mount

Printing plate is too soft

Use a higher durometer plate

Ink film applications are uneven due to press or plates that are not level

Adjust ink metering, print and anilox impressions, roll parallel or replace plates

Ink film too thick for plate and art design

Reduce ink film thickness by lowering ink viscosity, increasing ink metering effectiveness or decreasing anilox volume

Positive or reverse type are too small for ink film thickness/metering

Revise art, screens and plates for press capabilities

Paper dust collects in the press or ink and sticks to the plate

Clean press, plates and environment. Ensure clean, sharp slitting and sheeting

Ink drying too fast

Add glycol or increase press speed

Ink pH is too low

Check and adjust pH (non-pH stable inks only)