BS 3137

Methods for Determining the Bursting Strength of Paper and Board - Describes the hydraulic methods for determining the bursting strength of paper in the range from 70 kN/m2 to 1100 kN/m2 and for board within the range 350 kN/m2 to 5500 kN/m2. The pneumatic method, sometimes needed for pulp handsheets and weak papers, is described in an appendix.