SNZ AS/NZS 1301.441
Methods of test for pulp and paper Method 441: Determination of roughness/ smoothness (air leak methods)-Sheffield method
|Publication Date:||21 December 2018|
This document specifies a method for the determination of the roughness of paper and board using the Sheffield apparatus.
This document is applicable to papers and boards which have Sheffield roughness values between 10 ml/min and about 3 000 ml/min. It is not suitable for soft papers which allow the lands of the test head to indent the surface, or for high air-permeance papers which allow a significant flow of air through the sheet, or for papers which will not lie flat during the test.