Usage :The Smoothness, Porosity and Softness Tester is intended for testing the average Smoothness, Porosity and Softness of paper and films
Definition :Air resistance is the resistance to the passage of air, offered by the paper structure, when a pressure difference exists across the boundaries of the specimen. It is quantified by obtaining the time for a given volume of air to flow
Device Description : The unit is supplied complete with – Lifting Handle Sample Punch, Adopter plate, 3 weights, 3 clamping plates. Air, at a low, uniform pressure is forced downward through an open tube to the upper orifice plate against which the sample is clamped. Each 50cc of air is marked and the test consists of timing the amount of air used in any of the three ways listed below:
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