90.93 Standard confirmed Mar 24, 2026
ISO
ISO/TC 6/SC 2 Test methods and quality specifications for paper and board
International Standard
85.060 Paper and board
Specifies the methods for the determination of folding endurance of paper using Köhler-Molin, Lhomargy, MIT and Schopper testers. The principle of the methods is folding backwards and forwards in a standardized manner of a narrow strip of paper subjected to a longitudinal stress, until it breaks. The Köhler-Molin, Lhomargy and Schopper methods are applicable to paper of thicknesses up to 0,25 mm thick and having a tensile strength greater than 1,33 kN/m. The MIT tester has interchangeable folding heads allowing a range of thicknesses up to 1,25 mm.
WITHDRAWN
ISO 5626:1978
PUBLISHED
ISO 5626:1993
90.93
Standard confirmed
Mar 24, 2026