ISO 3689:2024
Paper and board — Determination of bursting strength after immersion in water
This document specifies a method for the determination of the wet strength of paper and board by measuring its bursting strength after it has been immersed in water for a specified period.
The method is applicable to most kinds of paper and board, provided that an appropriate immersion time is agreed between the interested parties.
Different results can be found if the sample is re-tested after a period of time.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus, reagents and materials
6 Sampling
7 Test pieces
7.1 Preparation
7.2 Conditioning
8 Procedure
8.1 Immersion
8.1.1 Immersion of the test pieces
8.1.2 Immersion times
8.1.3 Excess water removal
8.2 Determination
8.3 Number of tests
9 Expression of results
10 Precision
11 Test report
Annex A (informative) Examples for support systems
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus, reagents and materials
6 Sampling
7 Test pieces
7.1 Preparation
7.2 Conditioning
8 Procedure
8.1 Immersion
8.1.1 Immersion of the test pieces
8.1.2 Immersion times
8.1.3 Excess water removal
8.2 Determination
8.3 Number of tests
9 Expression of results
10 Precision
11 Test report
Annex A (informative) Examples for support systems
Bibliography