Plate Binding or Wear

Problem:

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

Solution:

Check rollers for condition and settings.

______________________________________________________________________

Problem:

Foreign particles are entering into the ink train.

Solution:

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

______________________________________________________________________

Problem:

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

Solution:

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.

______________________________________________________________________

Problem:

Blanket is overpacked or loose.

Solution:

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

______________________________________________________________________

Problem:

Fountain solution may be out of balance.

Solution:

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

______________________________________________________________________

Problem:

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

Solution:

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

______________________________________________________________________

Problem:

Excessive calcium, gum and other material in roller train.

Solution:

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