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BS EN ISO 20705:2020

BS EN ISO 20705:2020

$142.49

Textiles. Quantitative microscopical analysis. General principles of testing

Published By Publication Date Number of Pages
BSI 2020 26
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This document specifies common methods for the quantitative microscopical analysis of various mixtures of fibres. The methods described are based on the use of a light microscope (LM) or a scanning electronic microscope (SEM), on the measurements of the fibre apparent diameter (preparation of longitudinal views) or on the measurements of fibre section area (preparation of cross views), depending on the section shape of the fibres.

NOTE 1

When the section shape is circular or almost circular, the longitudinal views are appropriate. For the other section shapes, the cross views are adequate and Annex A lists conventional density of fibres to be used for the calculation of the mass percentage of the components. Pictures of section shapes of fibres can be found in ISO/TR 11827 .

NOTE 2

Annex B presents statistical data on fibre diameter measurements (longitudinal view) and on fibre area measurements (cross view).

The given procedures apply to fibres in any textile form when mixtures of fibres cannot be separated by manual methods or by chemical methods.

Examples of mixtures of fibres are cashmere and wool, cotton and flax, flax and hemp.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
10 5 Apparatus
5.3.1 Scissors, tweezers, dissecting needle, cleaning fabric, watch-glass, etc.
6 Reagents
7 Preparation of the test specimens
7.1 Selection of the test specimens
7.1.1 General
11 7.1.2 Loose fibres
7.1.3 Slivers
7.1.4 Yarns
7.1.5 Fabrics
12 7.2 Preparation of a test specimen slide (LM) or stub (SEM)
7.2.1 Preparation for longitudinal view for LM
7.2.2 Preparation for longitudinal view for SEM
7.2.3 Preparation for cross view for LM or SEM
13 8 Procedures
8.1 General
8.2 LM procedure
8.2.1 Longitudinal view
8.2.2 Cross view
8.3 SEM procedure
8.3.1 Longitudinal view
14 8.3.2 Cross view
9 Calculation and expression of the results
9.1 Calculation based on fibre diameter measurements (Longitudinal view)
15 9.2 Calculation based on fibre area measurements (Cross view)
9.3 Calculating the percentage by mass of fibre component in woven fabric sample
10 Test report
17 Annex A (normative) Fibre density (Conventional)
18 Annex B (informative) Statistical data
25 Bibliography

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BS EN ISO 20705:2020
$142.49