Paper and board — Determination of roughness/smoothness (air leak methods) — Part 3: Sheffield method

Informace o normě:

Označení normy: ISO 8791-3:2017-ed.3.0
Datum vydání normy: 14.8.2017
Počet stran: 14
Přibližná hmotnost: 42 g (0.09 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy ISO

Anotace textu normy ISO 8791-3:2017-ed.3.0 :

Description / Abstract: ISO 8791-3:2017 specifies a method for the determination of the roughness of paper and board using the Sheffield apparatus. ISO 8791-3:2017 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.