Packaging is an important
thing that helps to protect the quality of the products. Hence, it is necessary
to produce high-quality of packaging material. There are various factors and
properties that enhance the quality of packaging products like compression
strength of boards, drop strength, the coefficient
of friction, water absorbent efficiency,
and many more. Out of the mentioned properties, water absorbency or liquid
penetration of a material is calculated to measure the sizing and porosity of
the single layered boards, papers, etc. It is a major issue which is concerned
with the safety of the product from moist conditions. If a paper or a board
absorbs sufficient amount of water, it will not be considered to be used in the paper& packaging industry to manufacture a carton or box. This property
can be tested efficiently with the help of a testing instrument, “Presto’s Cobb
Sizing Tester”
It is the best testing
device that measures the resilience property and water absorption property of
treated or untreated papers and boards and other related materials under some
given conditions. The test with the
help of Cobb Sizing tester can be performed easily to determine its liquid
penetration property. To perform the test, take the weight of the paper and
then place a piece of cardboard in a cylindrical tube and then pour 100cc of
liquid in the cylinder. Leave the specimen for a given period of time. Now
drain out the liquid and weight the specimen after draining out the extra water
from the specimen. Now compare the result. The test will give you an accurate measurement to analyze the water
absorbing potency of the board.

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