BS ISO 5628:2019 pdf free.Paper and board - Determination of bending stiffness一General principles for two-point, three-point and four-point methods. The two-point method is suitable for paper and low-thickness board. For corrugated board, the two-point method is not recommended. The bending according to the two-point bending method can be performed in two ways. In Figure 2, the beam-shaped test piece is...
