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Plate Binding or Wear

Problem:

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

Solution:

Check rollers for condition and settings.

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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.

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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.

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Problem:

Blanket is overpacked or loose.

Solution:

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

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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.

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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.

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Problem:

Excessive calcium, gum and other material in roller train.

Solution:

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

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Problem:

Plate has been improperly prepared.

Solution:

Review procedures for plate making process.

*The solutions provided from the troubleshooting guide are general in nature, please contact or your sales or technical representative to discuss specific issues.

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Sun Chemical offers a broad ink and coating product portfolio with a wide range of capabilities that include sheetfed inks, coatings, color software and brand color management.

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