ISO 137-2015 PDF

Full title and description

ISO 137:2015 — Wool — Determination of fibre diameter — Projection microscope method. This International Standard specifies the procedure and the measurement conditions for determining the diameter of wool fibres by means of a projection microscope; the method is suitable for wool in any form and for other fibres with a reasonably circular cross‑section.

Abstract

ISO 137:2015 defines the projection‑microscope technique: projecting magnified images of fibre profiles, measuring widths on a scale, and applying specified sampling and measurement conditions to estimate wool fibre diameter. It notes that processing (dyeing, bleaching, finishing) can alter diameter and that measurements at different processing stages may differ.

General information

• Status: Published (current edition confirmed on review).
• Publication date: 2015 (Edition 2, published November–December 2015).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.060.10 (Natural fibres / Textiles).
• Edition / version: Edition 2 (2015).
• Number of pages: 12 (official ISO edition page count; national/adopted versions may list different pagination due to national front matter or combined EN transpositions).

Scope

Specifies the procedure and measurement conditions for determining wool fibre diameter using a projection microscope. Applicable to wool fibres in any form and to other fibres of reasonably circular cross‑section. The standard describes sampling, sample preparation, apparatus, measurement technique and reporting conventions; it also warns that processing (e.g., dyeing, bleaching, finishing) can affect measured diameters and that results at different production stages are not necessarily identical.

Key topics and requirements

• Projection microscope technique — projecting magnified fibre profiles and measuring widths on a calibrated scale.
• Sampling and sample preparation rules to obtain representative fibre samples.
• Specified measurement conditions (magnification, calibration, number of measurements) to ensure comparability.
• Suitability statement: method applies to wool and other approximately circular fibres; cautions about treated/processed fibres.
• Reporting requirements: mean diameter, distribution notes and any deviations from the standard procedure.
• Relation to calibration standards and reference tops used for instrument calibration in the wool industry.

Typical use and users

Used by textile testing laboratories, wool producers and processors, quality control units in spinning and carding mills, research institutions studying fibre properties, and standards bodies implementing or transposing ISO methods into national documents. It is also referenced by technical committees and by organizations that maintain calibration tops and reference materials for fibre‑diameter instruments.

Related standards

ISO 137 is part of the body of wool and textile testing standards. Related and cross‑referenced documents include standards on sampling and conditioning (for example ISO 1130 series on sampling and ISO 139 on standard atmospheres for conditioning/testing) and older projection‑microscope methods (historic ISO 137:1975 and other projection microscope standards for medullation and related measurements). National and EN adoptions (EN ISO 137) transpose ISO 137 into regional collections.

Keywords

wool; fibre diameter; projection microscope; fibre measurement; textile testing; sampling; calibration; natural fibres; ISO 137:2015.

FAQ

Q: What is this standard?

A: ISO 137:2015 is the International Standard that specifies a projection‑microscope method for measuring wool fibre diameter (Edition 2, 2015).

Q: What does it cover?

A: It covers apparatus, sampling, sample preparation, measurement procedure, calibration and reporting of fibre‑diameter results obtained with a projection microscope; it also states applicability limits (mostly circular cross‑section fibres) and cautions about processed fibres.

Q: Who typically uses it?

A: Textile and wool testing laboratories, manufacturers, quality control personnel, research labs, and standards/adoption bodies (including organizations that supply calibration tops and reference materials for fibre‑diameter instruments).

Q: Is it current or superseded?

A: ISO 137:2015 is the current edition that replaced ISO 137:1975; the ISO record shows the 2015 edition as published and confirmed on subsequent review cycles (no later amendment listed on the ISO bibliographic entry at the time of record).

Q: Is it part of a series?

A: It belongs to the family of ISO standards for textile testing (ISO/TC 38/SC 23) and is commonly used alongside other wool and fibre standards dealing with sampling, conditioning and related projection‑microscope tests; national and EN adoptions appear as EN ISO 137 in many regions.

Q: What are the key keywords?

A: Wool, fibre diameter, projection microscope, textile testing, sampling, calibration, natural fibres, ISO 137.