Cobb Tester

Water Absorptiveness also known as the Cobb Value is the function or method to determine the characteristics of paper, paperboard & corrugated boards including the porosity, sizing, and fiber compositions. This process is performed on various sheets or non-bibulous i.e. highly absorbent paper or paperboards in order to determine the relative rate of penetration of aqueous solutions such as water or other solutions. It indicates the degree of the surface and internal sizing. This method is not designed for the water resistance test and neither to measure the resistance to minute quantities of a liquid, but it is introduced to test how much water a material can absorb in a given period of time so as to check the penetration strength of the material. If a specimen absorbs more water, then it will be considered as unappropriate materials to fulfill the purpose of packaging and if a specimen absorbs less water, then it will be considered as most appropriate materials to fulfill the purpose of packaging.