Importance of performing Cobb test in packaging industry

Importance of performing Cobb test in packaging industry

Cobb test

In order to ensure the optimum quality and performance of paper products, it is imperative that they undergo meticulous testing for their Cobb value. The Cobb value, often referred to as the water absorption rate, plays a pivotal role in evaluating the absorbency and moisture resistance capabilities of paper material.

To ensure that your packages will easily withstand the Cobb value of the product, we at Presto have come up with high-quality testing equipment known as Cobb sizing tester.

By subjecting paper products to rigorous Cobb value tests, manufacturers can assess their suitability for various applications ranging from packaging materials to printing papers. This comprehensive examination not only guarantees that the selected paper can withstand potential exposure to moisture during transportation or storage but also ensures its ability to retain structural integrity under wet conditions.

In this blog, we will discuss a brief about Presto Cobb sizing tester and why it is important to perform the Cobb sizing test on paper & its related products.

What is the Cobb Test and its use in the paper & packaging industry?

The Cobb Test is a test used to measure the water absorption of paper and paperboard. It is an important quality control testing equipment, that can be used in the paper & packaging industry to measure the water absorbed by paper, paperboard, corrugated board, and fiberboard over a specific period of time.

Its purpose is to test the water absorption over the surface and test whether the material will be suitable for the intended application or not.

With Presto Cobb sizing tester, manufacturers can easily determine the Cobb value of packaging materials and ensure that accurate products will be delivered to the customers.

Now, let us discuss brief information about this quality testing equipment.

Test the water absorbency level of paper products with Presto Cobb sizing tester

In the realm of paper manufacturing, the assessment and analysis of Cobb's value have become critical steps to ensure product quality. The Cobb value of the product refers to the amount of water absorbed by a sheet of paper within a specified time frame.

This parameter plays an integral role in determining the performance and durability of various paper products, making it imperative for manufacturers to thoroughly examine this aspect.

You can easily analyze the quality of packaging materials in wet working conditions, with the help of a Cobb sizing tester.

This quality testing equipment has been made in compliance with industry standards and a high-grade stainless steel test area to ensure accuracy in test results.

Now, let us discuss the features and technical specifications of this quality testing equipment.

Features of Presto Cobb sizing tester

Presto Cobb sizing tester has been designed with high-quality features that make it easy for manufacturers to conduct Cobb sizing tests on the materials. Below we have listed the features of this quality testing equipment.

  • High-Quality rugged structure with the corrosion-resistant main body

  • Lightweight and resilient

  • Fast Locking Mechanism

  • Single-handed hassle-free operation

  • Highly accurate test results

  • High-Grade stainless steel test area

  • Made with compliance industry standards

Technical specifications of Presto Cobb sizing tester

  • Sample Diameter: 130 mm (approx)

  • Depth of cylinder: 60 mm

  • Diameter of Cylinder: 112mm

  • Diameter of rubber pad: 145 mm

  • Water level indicator in the cylinder: 10 mm and 25 mm

  • Weight of roller: 10 kg (approx.)

  • Placement of machine: Bench Model

  • Two Water Level Indicators in Cylinder: 10mm and 25mm

  • Made with standards: TAPPI – T441, IS 1060

With these high-end features and technical specifications, manufacturers can easily conduct Cobb sizing tests on the materials by measuring the water absorbency strength of packaging products.


The Cobb Test is a crucial step in assessing the quality of packaging for various products. Its results can tell you whether or not your packaging is suitable for its contents, and if it isn’t what needs to be done to ensure that everything stays safe.

This test can also help you identify any weak points in your packages and find ways to improve them before they reach consumers. You can easily conduct a Cobb sizing test on the materials with the help of the Presto Cobb Sizing Tester. If you want a free sample testing session for the use of this quality testing equipment, then you can give us a call at  +91-9210 903 903 or email us at Our team of technical experts will consult you regarding all your needs and queries.

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