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Defect Catalog Extract

Hole

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.

 


Wrinkle

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

Streak

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

 

 


Contact


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52076 Aachen
Germany
tel: +49 (2408) 92 700 - 0
fax: +49 (2408) 92 700 - 500
info@isravision.com 


Customer Examples

  • Abitibi
  • Atlantic Packaging
  • Bowater
  • Guangzhou Paper
  • Irving Paper
  • Madison Paper
  • Malaysian Newsprint
  • Norske Skog
  • Palm Papier
  • Pan Asia
  • Stora Enso
  • UPM-Kymmene