Cobb–Unger oil absorbance test for paper and board
In this absorption test, castor oil is used to evaluate the oil absorbance of a paper or board product.
During the analysis, oil is applied on top of the sample with an L&W Cobb sizing tester, and the mass of oil absorbed by a set period is expressed as grams per square meter (g/m²).
The Cobb-Unger test is often performed to assess whether the material is suitable for use as packaging for oily foodstuff.
- Suitable sample matrices
- Paper and board
- Minimum sample amount
- Two A4 sheets
- Typical turnaround time
- 2 weeks after receiving the samples
- Quality system
- Accredited testing laboratory
- Device types
- Method expert
![Ville Roininen]()
Ville Roininen
Paper and board
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