What is ISO 5628 — Bending stiffness of paper and board about?
ISO 5628 is an international standard that deals with paper and paperboard. ISO 5628 specifies three test methods for determining the bending stiffness of paper and paperboard. The test methods differ in the type of loading mode, thus giving rise to the two-point, three-point, and four-point bending test methods.
ISO 5628 gives technical specifications terms, definitions, symbols, theory, different bending test methods, apparatus, sampling and preparation of test pieces, procedure, evaluation, and calculation and states the test reports for determination of bending stiffness. BS ISO 5628:2019 history
2019BS ISO 5628:2019 Paper and board. Determination of bending stiffness. General principles for two-point, three-point and four-point methods
2012BS ISO 5628:2012 Paper and board. Determination of bending stiffness. General principles for two-point, three-point and four-point methods
1991BS 7424:1991 Guide to general principles for determination of the bending stiffness of paper and board by static methods