Dull, pit-like areas on the rolling surface
(Under)corrosion
Cannot be cleaned
Corrosion appears as dull, rough, or pitted areas on the anilox surface. It often takes on a “butterfly shape”: a dark center (the damaged area) surrounded by a lighter area. These spots cannot be cleaned. They are permanently damaged by tiny cracks in the ceramic; they are not caused by surface contamination.
How does it arise?
- Prolonged exposure to ink, moisture, or chemical residues on the roller.
- Inadequate rinsing, harsh cleaning agents, or prolonged machine downtime with product residue can lead to subsurface corrosion.
What to do.
- Unfortunately, corrosion cannot be cleaned off.
- Remove the roll from production and consult a CSG troubleshooter for further evaluation.
Please note:
This is permanent damage to the ceramic. Repairing or replacing the roller is the only solution. Contact Clean Solutions Group for advice.
Related issues
(Under)corrosion
Score lines
Aluminum
Starch
Lime
Spots
Always wear the appropriate personal protective equipment (PPE) when using cleaning products.