Plate Blinding or Wear

Faulty or improperly set ink or dampening rollers are wearing the plate

Check rollers for condition and settings

Foreign particles are entering into the ink train

Check paper, ink, solutions and overhead structures for foreign materials that may be dropping onto press

Plate cleaners or scratch removers have not been completely rinsed from the plate

Avoid excessive amounts of plate cleaner and scratch remover. Rinse plates thoroughly afterwards Be sure all water, sponges, rags, etc., that come in contact with the plate are clean. Do not let cleaners dry on the plate

Blanket is over-packed or loose

Check packing or blanket tension. Set to manufacturer’s specifications

Fountain solution may be out of balance

Check pH, conductivity, Brix level, and temperature. Ensure pan temperature is close to 65°F (18°C) and solvent level is not too high

Stock is depositing filler, coating, or lint on the blanket affecting plates

Review dampening settings. Check pH and conductivity. Discuss alternatives with your paper supplier

Excessive calcium, gum and other material in roller train

Apply a calcium rinse or hot water/white vinegar (2:1) rinse

Plate has been improperly prepared

Review procedures for plate making process