With the development of our society, new packaging materials have appeared in the market and customers use them on a regular basis. Nevertheless, the corrugated box still remains the favourite packaging material for the industrial sector due to its environment friendliness, low cost and reliability.  Corrugated boxes are known for their eco friendliness, flexibility and lightweight, which makes them easy to handle while packaging, storing, loading as well as unloading. Moreover, they are available in standard as well as customised forms depending upon the customer’s requirement.

There are various factors like extreme pressure, water and high humid conditions that can affect the quality of the corrugated box and the packed item during storage or shipping. Thus, it becomes extremely important to use only quality tested boxes for packaging purpose. By using Cobb Sizing Tester and rigorous quality testing methods, a manufacturer can easily detect product related flaws during the production stages.

What is the importance of Moisture Control?

The moisture control of a corrugated board plays a vital role in the product’s final quality.  During the production stages, many manufacturers have faced the problem caused due to inaccurate moisture control.  The excessive water content can cause softening of boards and it can also cause them to collapse. Moreover, a moderate amount of water can make them dry.  Labtiger’s Cobb Sizing Tester is a specifically designed device used for determining the quantity of moisture or water absorbed by a board.  It is widely admired for providing quick, reliable and precise results.


How can you perform a Cobb Test?

You can conduct this test in a Cobb testing instrument, which is a highly efficient and reliable device for evaluating the amount of water penetration into a corrugated board, paper or cardboard.  It is equipped with a cylindrical container which is firmly attached to a flat base along with adjustable backing for sample placement. A digital weighing balance is used to weigh it to the nearest 0.1 gram.  After determining the weight, the specimen is placed on a metal plate and it is firmly clamped to avoid any leakage.

Non-absorbent gasket and soft elastic can be used to ensure leak free clamping. 100ml or 200ml of water is poured on the sample as per requirement. Let it remain submerged in water for the specified duration.  You can reject any sample that shows any sign of leakage or spillage.  Remove the sample and water from the cylinder after completion of the test. A hand roller is used to drain any excessive amount of water. Now, again weigh the specimen using a digital weighing machine. In order to measure the Cobb value, the weight of the sample before testing should be subtracted from the current weight.