Roughness acc. Bendtsen

The Bendtsen method is more suitable for determining surface quality, especially for rougher surfaces, than, for example, the Parker Print Surf (PPS) measurement method or the Bekk smoothness method. To determine the Bendtsen roughness, air is forced through a gap between the board and a metal ring lying on it within a certain time under defined conditions. The volume of air flowing out per minute gives the result (ml/min). A lower measured value represents a smoother surface.

In short — AI-generated

The Bendtsen test measures the surface roughness of packaging materials, such as paper and board, by forcing air through a gap between the material and a metal ring. The test is performed under defined conditions, with the air flow measured over a set time period. The result is the volume of air that flows out per minute, in milliliters per minute (ml/min).

The resulting value represents the surface roughness of the material, with lower values indicating a smoother surface. This information is useful for packaging developers and buyers to evaluate the quality and suitability of materials for their applications. The Bendtsen roughness value can be used to compare different materials and to optimize packaging designs.

Text is AI-generated; based on test method data curated and verified by Innoform.

Test Method Group: Mechanical properties

Norms:

ISO 8791-2 (2013-09) Paper and board - Determination of roughness/smoothness (air leak methods) - Part 2: Bendtsen method

Required Sample Amount: optimum: 5 DIN A 4 sheets without folds, creases or other damages

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