BS ISO 2493-1:2010

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Calibration
7 Sampling
8 Conditioning
9 Preparation of test pieces
10 Procedure
11 Calculation and expression of results
12 Test report
Annex A (informative) - Precision
Bibliography

Describes procedures, based on the two-point loading principle, for determining the bending resistance of paper and board.

This part of ISO2493 specifies procedures, based on the two-point loading principle, for determining the bending resistance of paper and board.

NOTE1 See ISO5628^[1] for a detailed description of the two-point loading principle.

This part of ISO2493 applies to the measurement of the bending resistance within the range 20mN to 10000mN. It is not applicable to corrugated board but can be applicable to the components of such board.

The bending angle is 15° and the bending length is 50mm.

For samples having a bending resistance that is too low to measure with a bending length of 50mm, a shorter bending length, i.e. 10mm, can be used.

IMPORTANT — The results obtained when using different bending lengths will not be comparable.

For boards that tend to be permanently deformed if bent through 15°, the half bending angle, i.e. 7,5°, can be used.

NOTE2 Taber-type testers and testers using the principle of constant rate of deflection do not give comparable results. For this reason, ISO2493:1992 has been divided into two parts.