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
Method expert
Ville Roininen

Order this test online

First sample (VAT 0):
136 €
Additional samples (VAT 0):
84 €per sample
If you have a large number of samples, contact us for a possible discount.

Samples are entered during checkout.

Our experts review all orders to ensure the testing method is suitable for your needs and samples.

Questions? We're happy to help.

Questions? We're happy to help.

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