ISO 137:2015
Wool — Determination of fibre diameter — Projection microscope method
ISO 137:2015 specifies the procedure and the measurement conditions for the determination of the wool fibre diameter using a projection microscope.
The method is suitable for wool fibres in any form and also for other fibres of reasonably circular cross-section. (In the case of dyed, bleached or finished fibres, the diameter might be different from that of fibres not subjected to such treatments. The estimates of fibre diameter obtained at the various stages of processing one lot of wool will not necessarily be the same.)
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling and preparation of the test specimens
6.1 Raw wool
6.2 Slivers, rovings and yarns
6.3 Cutting of snippets
6.3.1 Using a fibre holder and pusher
6.3.2 Using a microtome
6.4 Mounting of test specimen
7 Test procedure
7.1 General
7.2 Examination of the test specimen
7.3 Focusing
7.4 Measuring the width of a fibre image
7.5 Recording of measurements
8 Measurement procedure
9 Calculation and expression of results
10 Test report
Annex A (informative) Example of calculation
Annex B (informative) Accuracy of results and confidence limits for mean
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling and preparation of the test specimens
6.1 Raw wool
6.2 Slivers, rovings and yarns
6.3 Cutting of snippets
6.3.1 Using a fibre holder and pusher
6.3.2 Using a microtome
6.4 Mounting of test specimen
7 Test procedure
7.1 General
7.2 Examination of the test specimen
7.3 Focusing
7.4 Measuring the width of a fibre image
7.5 Recording of measurements
8 Measurement procedure
9 Calculation and expression of results
10 Test report
Annex A (informative) Example of calculation
Annex B (informative) Accuracy of results and confidence limits for mean
Bibliography