This part of is 8791 specifies a method for determining the roughness of paper and board using the Bendtsen apparatus. This part of is 8791 is applicable to paper and board with Bendtsen roughness values are between 5 ml/min and 3,000 ml/min when measured with variable area testing devices and between 50 ml/min and 5,000 ml/min when measured with devices of the type electronic. It is not applicable to soft papers on the surface of which a ring can leave a clearly vis ble mark, nor to papers with high air permeability through which a flow rate
NF Q03-079-2*NF ISO 8791-2:2014 Referenced Document
ISO 186 Paper and board - Sampling to determine average quality
ISO 187 Paper, board and pulps; standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples*， 2022-01-01 Update
NF Q03-079-2*NF ISO 8791-2:2014 history
2014NF Q03-079-2*NF ISO 8791-2:2014 Paper and board - Determination of roughness/smoothness (air leak methods) - Part 2 : Bendtsen method