ISO 1973:2021
Textile fibres — Determination of linear density — Gravimetric method and vibroscope method
This document specifies a gravimetric method and a vibroscope method for the determination of the linear density of textile fibres applicable respectively to:
a) bundles of fibres;
b) individual fibres.
Useful data can be obtained on man-made fibres and, with less precision, on natural fibres.
This document only applies to fibres which can be kept straight and, in the case of bundles, parallel, during test preparation. It is properly applicable when the fibres are readily freed of crimp. The methods in this document are not applicable to tapered fibres.
The vibroscope method is not always applicable to hollow and flat (ribbon-like) fibres.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 General
4.2 Gravimetric method, for bundles of fibres
4.3 Vibroscope method, for individual fibres
5 Apparatus
5.1 Gravimetric method apparatus
5.2 Vibroscope method apparatus
6 Sampling
7 Conditioning and testing atmospheres
8 Procedure
8.1 Gravimetric method
8.2 Vibroscope method
9 Expression of results
9.1 General
9.2 Gravimetric method
9.3 Vibroscope method
10 Test report
Annex A (informative) Examples of calculation of mean linear density
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 General
4.2 Gravimetric method, for bundles of fibres
4.3 Vibroscope method, for individual fibres
5 Apparatus
5.1 Gravimetric method apparatus
5.2 Vibroscope method apparatus
6 Sampling
7 Conditioning and testing atmospheres
8 Procedure
8.1 Gravimetric method
8.2 Vibroscope method
9 Expression of results
9.1 General
9.2 Gravimetric method
9.3 Vibroscope method
10 Test report
Annex A (informative) Examples of calculation of mean linear density
Bibliography