Tensile (N) ISO 1924-2
Is the measurement of a force (N) to elongate a defined paper stripe to its break. The width of the test stripe is 15 mm. Tensile is measured in md and cd, the values in MD are significantly higher than the values in CD, the reason for this is the orientation of the fibres during the forming process in the paper machine in MD.
Elongation (%) Stretch at break ISO 1924-3
This elongation of the paper test stripe in the tensile measurement to the break is called strain, the higher the strain the higher is theoretically the flexibility of the paper in the printing machine to resist against tension-variations.
Tear or tear resistance (mN) ISO 1974
The tear strength is the force a singel sheet can resist when one part of the paper is taken out of the plane, i.e. in the z-direction and perpendicular to both MD and CD. Tear strenght is measured according to the Elmendorf method.