Water permeability is an important test for textile materials like fabric specially when it is applied on some special area like water proof or water repellent fabric. There are at least five testing procedure of water permeability of fabric in textile industry. All of those tests are specified for any specific type of material. Out of these 5 tests, in this tutorial I am just explaining drop penetration test which is very important. So, follow the video to know more about the drop penetration test and how this test is carried out and what are the basic things associated with the testing procedure. You will come to know after watching the video in Bengali language.
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