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Bendtsen Type-01 Products Paper Testing Instruments Surface Roughness Smoothness Tester Bendtsen Type-01
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|  Roughness of paper or similar material is defined as the volume of air that forced by a sepcified pressure difference escapes in unit time by passing between the surface of the specimen and flat metal ring resting on a specimen and excerting a definate pressure on it.
A sample is placed on a perfect plane glass plate, measuring head on the test piece a controlled and small air pressure pass through a flat metal ring and the specimen. The pressure difference read off on selected rotameter tube. The Bendtsen Smoothness & Porosity Tester is used for determing the smoothness and porosity of paper, paperboard and similar material is based on air leak principal.
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