Testing services / Cobb–Unger oil absorbance test for paper and board

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
Standard specific equipment
Method expert
Ville Roininen
Ville Roininen
Paper and boardPaper and boardPhysical and chemical propertiesPhysical and chemical properties

Pricing and online order

Price per sample (Excl. VAT):
84 €

We also charge a 97 € service fee per order.

Large batches of samples are eligible for discounts.

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.

Business hours: Mon–Fri 9 AM – 5 PM Finnish time (EST/EEST)

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Have questions or need help? Email us at or call +358 50 336 6128.