• Packaging
  • Packaging
  • 包装


Defect Catalog Extract


Alternative terms: Sludge, slime hole, pinhole

Appearance: Diverse in shape, sometimes with a dark area, where the paper is folded. Circular in shape and very small.

Bright Spot

Alternative terms: Thin Spot, Water Drop

Appearance: Bright area with soft edge, sometimes with periodic occurrence, often lengthwise.


Dark Spot

Alternative terms: Dirt, sludge, scrap, debris

Appearance: Small dark spot with variable shape. Sometimes in bursts across the whole web; dark spot with variable shape and high contrast.

Edge Crack

Appearance: Crack, sometimes combined with a wrinkle mostly ending at the edge. The wrinkle is often sickle-shaped.



Appearance: Dark with good contrast and sharp edges, up to three layers of paper, often running inwards from the paper edge.


Appearance: Oriented in machine direction, not always sharp edges, length depending on coating device. Width may vary considerably.




Pascalstraße 16
52076 Aachen
tel: +49 (2408) 92 700 - 0
fax: +49 (2408) 92 700 - 500

Supported Applications

  • Wrapping Paper
  • Board / Recycled
  • Folding boxboard
  • Testliner

Customer Examples

  • CMPC
  • Condat
  • J. Moritz Weig
  • Klingele
  • Matussiere & Forest
  • Smurfit