ISO 3781:2011
Paper and board — Determination of tensile strength after immersion in water
ISO 3781:2011 specifies a test method for the determination of the wet tensile strength of paper or board after its immersion in water for a specified period.
In principle, the method is applicable to both paper and board, provided an appropriate soaking time is agreed between the interested parties.
It is not applicable to tissue paper and tissue products other lightweight, highly absorbent paper which is difficult to handle or of low strength when wet (see ISO 12625‑5).
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1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling
7 Conditioning
8 Preparation of test pieces
9 Procedure
10 Calculation and expression of results
10.1 General
10.2 Wet tensile strength
10.3 Wet tensile strength retention
11 Test report
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1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling
7 Conditioning
8 Preparation of test pieces
9 Procedure
10 Calculation and expression of results
10.1 General
10.2 Wet tensile strength
10.3 Wet tensile strength retention
11 Test report