A method of measuring the z-directional tensile strength of a sample (2) of paper or board in a direction perpendicular to its surface by coating the sample (2) on the two opposite surfaces with double-sided pressure-sensitive adhesive tape (5, 5) so as to obtain a sandwich structured sample web (3);...http://www.google.com.au/patents/US6386027?utm_source=gb-gplus-sharePatent US6386027 - Method and device for measuring z-directional tensile strength of paper or board
