ISO 287:2017
Paper and board — Determination of moisture content of a lot — Oven-drying method
ISO 287:2017 specifies an oven-drying method for the determination of the moisture content of a lot of paper and board. The procedure in Clause 8, describing how the test pieces are drawn from the lot, is performed at the time of sampling.
ISO 287:2017 is applicable to every type of lot of paper and board, including corrugated board and solid board, provided that the paper or board does not contain any substances, other than water, that are volatile at the temperature specified in this document.
NOTE For determination of the dry matter content of a sample of paper or board, e.g. for calculation of the dry mass of the sample, ISO 638[1] can be used.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Preparation of containers
7 Sampling
8 Selection, preparation and weighing of test pieces
8.1 General
8.2 If the unit is a package that can be and may be unwrapped, or is in an unwrapped form
8.2.1 When the unit is not subdivided and not a reel
8.2.2 When the unit is composed of elements
8.2.3 When the unit is a reel
8.3 When the unit is a package that cannot or should not be completely unwrapped
8.3.1 Average moisture content for samples with known machine direction
8.3.2 Average moisture content for samples with unknown machine direction
8.3.3 Variations in moisture content of sheets or across the reel
9 Procedure
9.1 Initial drying and weighing
9.2 Drying and weighing to constant mass
10 Calculation and expression of results
10.1 Calculation
10.2 Expression of results
11 Test report
11.1 General
11.2 When an average moisture content is required
11.3 When a variation in moisture content is required
Annex A (informative) Precision data
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Preparation of containers
7 Sampling
8 Selection, preparation and weighing of test pieces
8.1 General
8.2 If the unit is a package that can be and may be unwrapped, or is in an unwrapped form
8.2.1 When the unit is not subdivided and not a reel
8.2.2 When the unit is composed of elements
8.2.3 When the unit is a reel
8.3 When the unit is a package that cannot or should not be completely unwrapped
8.3.1 Average moisture content for samples with known machine direction
8.3.2 Average moisture content for samples with unknown machine direction
8.3.3 Variations in moisture content of sheets or across the reel
9 Procedure
9.1 Initial drying and weighing
9.2 Drying and weighing to constant mass
10 Calculation and expression of results
10.1 Calculation
10.2 Expression of results
11 Test report
11.1 General
11.2 When an average moisture content is required
11.3 When a variation in moisture content is required
Annex A (informative) Precision data
Bibliography