UNE-EN ISO 13937-2:2001 Textiles – Tear properties of fabrics
Five samples for the warp and five samples for the weave must be tested for each material. Test: the test piece is fixed on the clamps, with a leg on each of them. The test piece non-cut part is free. The dynamometer is turned on with a 100 mm/min constant speed, moving one of the clamps (mobile clamp) and the tearing must be continued until it arrives to the marked point 2,5 cm of the test piece's edge.
Tearing calculation: from each of the tested test pieces, the resulting graphic must be divided in four equal parts. First part must be despised and the remaining three, the two higher peaks and two lower peaks are taken. With these 12 obtained results in each testing tube a media is done.