ISO 137:2015

Name: ISO 137:2015 — Wool — Determination of fibre diameter — Projection microscope method
SKU: ISO 137:2015
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Wool — Determination of fibre diameter — Projection microscope method

Название (английский):

ISO 137:2015

Wool — Determination of fibre diameter — Projection microscope method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 23 ноября 2015 г.
Издание:: ISO IS 137 edition 2 version 1
ICS:: 59.060.10

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Описание (английский):

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.)

Abstract

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Стандарты, упомянутые в описании

Overview

ISO 137:2015 - "Wool - Determination of fibre diameter - Projection microscope method" specifies a standardized laboratory procedure for measuring wool fibre diameter by projecting magnified fibre snippets onto a screen and reading their projected widths. The method is suitable for wool in any form and for other fibres with reasonably circular cross-sections. ISO 137:2015 updates the earlier 1975 edition and is based on IWTO-8:2011.

Key topics and technical requirements

Principle: measure the projected width of fibre snippets using a projection microscope to obtain the mean diameter.

Apparatus: projection microscope with light source, condenser, stage, objective/ocular capable of 500× magnification, circular screen with graduated scale; certified micrometer scale for calibration (0.01 mm on stage projects to 5 mm on screen).

Stage movement: sliding stage with 1.0 mm step capability to ensure random, non-overlapping fields.

Snippet cutting: cut fibre pieces of 0.8 mm length using a fibre holder/pusher or a microtome; detailed cutter designs and procedures are specified to avoid selection bias.

Mounting medium: refractive index 1.43–1.53 at 20 °C, suitable viscosity, zero water absorption, and no effect on fibre diameter (examples: cedarwood oil, liquid paraffin; anhydrous glycerine not suitable).

Sampling & conditioning: total sample preparation follows ISO 1130; conditioning in the standard atmosphere per ISO 139.

Measurement rules: traverse slide in 1.0 mm steps, measure every fibre image in the measurement area except those excluded by defined criteria (e.g., partly outside central circle, damaged, overlapping).

Calibration, calculation & reporting: magnification checks, periodic calibration with micrometer scale, calculation of mean diameter, and reporting requirements; annexes provide example calculations and confidence limits.

Applications and users

ISO 137:2015 is used for:

Textile and wool testing laboratories for quality control and specification verification.

Wool brokers and processors for grading and batch assessment during scouring, carding or spinning stages.

Yarn and fabric manufacturers monitoring raw fibre properties to optimize processing.

Research and development in fibre science and textile engineering.

Instrument manufacturers and calibration labs for verifying projection microscope performance.

This method provides a direct, reproducible measure of wool fibre diameter, supporting product grading, process control, material selection and compliance with textile quality standards.

Related standards

ISO 139 - Textiles - Standard atmospheres for conditioning and testing

ISO 1130 - Textile fibres - Some methods of sampling for testing

IWTO-8:2011 - Source method referenced in the development of ISO 137:2015

Keywords: ISO 137, wool fibre diameter, projection microscope method, fibre diameter testing, textile testing standard, wool measurement.

ISO 137:2015

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

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