ISO 1888:2022
(Main)Textile glass — Staple fibres or filaments — Determination of average diameter
Textile glass — Staple fibres or filaments — Determination of average diameter
This document specifies three test methods used for determining the average diameter (i.e. the average value of actual diameters) of staple fibres or filaments in a textile glass product.
Verre textile — Fibres discontinues et filaments — Détermination du diamètre moyen
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 1888
Fourth edition
2022-01
Textile glass — Staple fibres or
filaments — Determination of average
diameter
Verre textile — Fibres discontinues et filaments — Détermination du
diamètre moyen
Reference number
ISO 1888:2022(E)
© ISO 2022
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ISO 1888:2022(E)
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© ISO 2022
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ISO 1888:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method A: Longitudinal profile .1
4.1 Principle . 1
4.2 Apparatus . 1
4.3 Procedure . 2
5 Method B: Transverse section . 3
5.1 Principle . 3
5.2 Apparatus . 3
5.3 Procedure . 4
6 Method C: Determination of the diameter by calculation . 5
6.1 Principle . 5
6.2 Test specimen . 5
6.3 Procedure . 6
7 Expression of results . 6
8 Test report . 6
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ISO 1888:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,
Composites and reinforcement fibres.
This fourth edition cancels and replaces the third edition (ISO 1888:2006), which has been technically
revised.
The main changes are as follows:
— “Method C” (determination of the diameter by calculation) has been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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INTERNATIONAL STANDARD ISO 1888:2022(E)
Textile glass — Staple fibres or filaments — Determination
of average diameter
1 Scope
This document specifies three test methods used for determining the average diameter (i.e. the average
value of actual diameters) of staple fibres or filaments in a textile glass product.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 472, Plastics — Vocabulary
ISO 1889, Reinforcement yarns — Determination of linear density
ISO 12154, Determination of density by volumetric displacement — Skeleton density by gas pycnometry
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Method A: Longitudinal profile
4.1 Principle
Fibres or filaments placed in a liquid medium having a refractive index differing from that of the textile
glass are viewed in profile under a microscope and the diameter measured.
4.2 Apparatus
4.2.1 Microscope, equipped with the following:
— An eye-piece with a built-in micrometer graticule, the eye-piece and objective together giving an
overall magnification of at least ×400 and preferably ×1 000. The resolution of the microscope shall
permit measurement to the nearest 0,5 µm or better.
— A system permitting lateral and rotational movement of the microscope stage.
— An illumination system.
This sys
...
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