EN ISO 10306:2014

• Abstract:

  ISO 10306:2014 specifies a method for the evaluation of the maturity of loose randomized cotton fibres by measuring the resistance to air flow of a plug of cotton fibres under two prescribed conditions. The method is applicable to cotton taken at random from bales. Laps and slivers or other sources of lint cotton may be tested, however results may differ if fibres are taken from bales.

• Status: Published
• Publication Date: 03-Jun-2014
• Withdrawal Date: 30-Dec-2014
• ICS: 59.060.10 - Natural fibres
• Technical Committee: CEN/TC 248 - Textiles and textile products
• Drafting Committee: CEN/TC 248/SC 2 - Physical properties
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 04-Jun-2014
• Completion Date: 04-Jun-2014
• Ref Project: SIST EN ISO 10306:2014 - Textiles - Cotton fibres - Evaluation of maturity by the air flow method (ISO 10306:2014)

• Replaces: EN ISO 10306:1995 - Textiles - Cotton fibres - Evaluation of maturity by the air flow method (ISO 10306:1993)
• Effective Date: 11-Jun-2014
• Refers: ISO 1130:1975 - Textile fibres — Some methods of sampling for testing
• Effective Date: 25-Aug-2026
• Refers: ISO 139:2005 - Textiles — Standard atmospheres for conditioning and testing
• Effective Date: 25-Aug-2026
• Refers: ISO 4912:1981 - Textiles — Cotton fibres — Evaluation of maturity — Microscopic method
• Effective Date: 25-Aug-2026
• Refers: ISO 2403:2014 - Textiles — Cotton fibres — Determination of micronaire value
• Effective Date: 09-Feb-2026
• Refers: EN 1170-3:1997 - Precast concrete products - Test method for glass-fibre reinforced cement - Part 3: Measuring the fibre content of sprayed GRC
• Effective Date: 28-Jan-2026
• Refers: EN 13480-6:2012/A1:2016 - Metallic industrial piping - Part 6: Additional requirements for buried piping
• Effective Date: 28-Jan-2026
• Refers: EN 1974:1998 - Food processing machinery - Slicing machines - Safety and hygiene requirements
• Effective Date: 28-Jan-2026
• Consolidated By: ISO 10306:2014 - Textiles — Cotton fibres — Evaluation of maturity by the air flow method
• Effective Date: 12-Feb-2026

Overview

EN ISO 10306:2014 - Textiles - Cotton fibres - Evaluation of maturity by the air flow method - specifies an international test method for assessing the maturity of loose, randomized cotton fibres by measuring the resistance to air flow through a packed plug of cotton under two prescribed compressions. The standard is intended primarily for cotton drawn from bales; laps, slivers or other lint sources can be tested but may give different results.

Key topics and technical requirements

• Principle: Air is passed through a specimen plug at two compressions to obtain two pressure-drop readings, PL (low compression) and PH (high compression). These values are used to calculate a maturity ratio (M) or percent maturity (P); the micronaire value is derived from PL.
• Apparatus: Required equipment includes a sensitive balance, an air-flow instrument (e.g., Fineness/Maturity Tester) with a compression cylinder (specified packing densities: ~0.1911 g/cm3 at low compression and ~0.3821 g/cm3 at high compression), air pump/valves, flow-rate control and pressure gauge.
• Specimen preparation: Samples must be well opened and randomized; blending apparatus is acceptable if it produces randomly oriented fibres (webs of parallel fibres are unsuitable).
• Conditioning and atmosphere: Samples are conditioned and tested under the standard atmosphere defined in ISO 139.
• Sampling and number of tests: Where unspecified, test at least two specimens with two tests on each; if successive PL or PH differ by more than 5% a new specimen is recommended.
• Procedure and accuracy: Record PL and PH after 10 s at each flow condition with pressure readings to 1 mm of water column. Average readings per specimen are used in calculations.
• Calibration and annexes: Annex A describes operation of the air flow instrument; Annex B describes instrument calibration and reference (international) cotton standards for calibration.

Applications and who uses it

• Quality control laboratories in ginneries, textile mills and cotton testing houses to monitor fibre maturity during raw material acceptance and process control.
• Cotton merchants and buyers assessing bale quality for trading and grading.
• Spinning and yarn manufacturers evaluating raw fibre properties that affect processing performance and end-product quality.
• Instrument manufacturers validating and calibrating air-flow maturity testers.
• Research and standards bodies studying fibre properties and comparing methods (air‑flow method vs. microscopic maturity methods).

Related standards

• ISO 139 - Standard atmospheres for conditioning and testing
• ISO 1130 - Sampling of textile fibres for testing
• ISO 2403 - Determination of micronaire value
• ISO 4912 - Microscopic method for cotton maturity

Keywords: EN ISO 10306:2014, cotton fibre maturity, air flow method, micronaire, cotton testing, textiles, Fineness/Maturity Tester, cotton fibres evaluation.

SLOVENSKI STANDARD
01-julij-2014
7HNVWLOLMH%RPEDåQDYODNQD2FHQMHYDQMH]UHORVWL]PHWRGR]UDþQHJDSUHWRND
,62
Textiles - Cotton fibres - Evaluation of maturity by the air flow method (ISO 10306:2014)
Textilien - Baumwollfasern - Bewertung der Reife durch das Luftstrom-Prüfverfahren
(ISO 10306:2014)
Textiles - Fibres de coton - Évaluation de la maturité par la méthode à courant d'air (ISO
10306:2014)
Ta slovenski standard je istoveten z: EN ISO 10306:2014
ICS:
59.060.10 Naravna vlakna Natural fibres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10306
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 59.060.10 Supersedes EN ISO 10306:1995
English Version
Textiles - Cotton fibres - Evaluation of maturity by the air flow
method (ISO 10306:2014)
Textiles - Fibres de coton - Évaluation de la maturité par la Textilien - Baumwollfasern - Bewertung der Reife durch das
méthode à courant d'air (ISO 10306:2014) Luftstrom-Prüfverfahren (ISO 10306:2014)
This European Standard was approved by CEN on 20 April 2014.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10306:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 10306:2014) has been prepared by Technical Committee ISO/TC 38 "Textiles" in
collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is
held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2014, and conflicting national standards shall be withdrawn
at the latest by December 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10306:1995.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 10306:2014 has been approved by CEN as EN ISO 10306:2014 without any modification.

INTERNATIONAL ISO
STANDARD 10306
Second edition
2014-06-01
Textiles — Cotton fibres — Evaluation
of maturity by the air flow method
Textiles — Fibres de coton — Évaluation de la maturité par la
méthode à courant d’air
Reference number
ISO 10306:2014(E)
©
ISO 2014
ISO 10306:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 10306:2014(E)
Contents Page
Foreword .iv
Introduction .v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Principle . 2
5  Apparatus and materials. 2
6  Atmosphere for conditioning and testing . 3
7  Sampling and number of specimens . 3
8  Procedure. 3
9  Calculations and expression of results . 3
10  Test report . 4
Annex A (normative) Operation of the air flow instrument “Fineness/Maturity Tester” .5
Annex B (normative) Method for instrument calibration . 6
ISO 10306:2014(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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and
yarns.
This second edition cancels and replaces the first edition (ISO 10306:1993), of which it constitutes a
minor revision.
iv © ISO 2014 – All rights reserved

ISO 10306:2014(E)
Introduction
The term “cotton fibre maturity” is commonly used to signify the relative degree of fibre wall development.
The measurement of the relative degree of wall thickening is too laborious for most practical purposes,
therefore the determination of the maturity of cotton fibres is done by indirect methods. A microscopic
method is described in ISO 4912:1981. This method has been used as a reference method for the
industrial evaluation of the maturity of cotton fibres using air flow instruments, which is the object of
this standard.
INTERNATIONAL STANDARD  ISO 10306:2014(E)
Textiles — Cotton fibres — Evaluation of maturity by the
air flow method
...