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
- Required sample quantity
- Two A4 sheets
- Typical turnaround time
- 2 weeks after receiving the samples
- Available quality systems
- Accredited testing laboratory
- Device types