NBN EN 21974 : 1995

Committees responsible
National foreword
Method
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Apparatus
6 Sampling
7 Conditioning
8 Preparation of test pieces
9 Procedure
10 Calculation and expression of results
11 Precision
12 Test report
Annexes
A Description, adjustment and maintenance of single
     tear testers
B Calibration of apparatus
C Units
Figure
A.1 Elmendorf-type tearing apparatus

Describes a method for determining the tearing resistance of paper. Can be used for light boards if the tearing resistance is within the range of the instrument. Does not apply to corrugated fibreboard, but may be applied to the components of such boards. Not suitable for determining the cross direction tearing resistance of highly directional paper. Includes normative references, definitions, principle, apparatus, conditioning, preparation of test pieces, procedure, calculation and expression of results, precision and test report.