EN ISO 13015:2013
(Main)Woven fabrics - Distortion - Determination of skew and bow (ISO 13015:2013)
Woven fabrics - Distortion - Determination of skew and bow (ISO 13015:2013)
ISO 13015:2013 specifies a method for the determination of the distortion of a woven fabric in which the weft yarns are, in principle, perpendicular to the warp yarns.
Gewebe - Verzerrung - Bestimmung des Schräg- und Bogenverzugs (ISO 13015:2013)
Diese Internationale Norm legt ein Verfahren zur Bestimmung des Verzugs eines Gewebes fest, bei dem die Schussfäden grundsätzlich senkrecht zu den Kettfäden liegen.
Étoffes tissées - Déformation - Détermination de l'écart angulaire et du cintrage (ISO 13015:2013)
L'ISO 13015:2013 spécifie une méthode de détermination de la déformation d'une étoffe tissée pour laquelle les fils de trame sont censés être perpendiculaires aux fils de chaîne.
Tkanine - Deformacija - Ugotavljanje poševnosti in usločenosti (ISO 13015:2013)
Ta mednarodni standard določa metodo za ugotavljanje deformacije tkanine, v kateri so votkovne niti načeloma pravokotne na osnovne niti.
General Information
- Status
- Published
- Publication Date
- 06-Aug-2013
- Withdrawal Date
- 27-Feb-2014
- Technical Committee
- CEN/TC 248 - Textiles and textile products
- Drafting Committee
- CEN/TC 248 - Textiles and textile products
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 07-Aug-2013
- Completion Date
- 07-Aug-2013
Relations
- Effective Date
- 28-Jan-2026
Overview
EN ISO 13015:2013 (ISO 13015:2013) - published by CEN/ISO - specifies a laboratory method to measure distortion in woven fabrics, specifically the determination of skew and bow where the weft (picks) are intended to be perpendicular to the warp (ends). The standard defines terms, specimen preparation, apparatus, measurement procedures and how to calculate and report results, helping textile manufacturers and test laboratories to quantify and control fabric distortion.
Key topics and technical requirements
- Scope: Measurement of distortion (skew and bow) in woven fabrics with perpendicular weft and warp yarns.
- Definitions:
- Skew: picks are straight but not at right angles to the ends.
- Bow: curvature of warp or weft across the width or length of the fabric.
- Principle: Trace a selected weft yarn across a flat, untensioned specimen and model its course using one or more triangles. Each triangle’s slope = height (a) / base (b); skew is expressed as a percentage of that slope. When multiple triangles are used, the highest skew value is reported.
- Apparatus: set square (right angle), metallic ruler ≥100 cm (or at least fabric width), small metallic ruler (20 cm), graduated in millimetres.
- Specimen and conditioning: full-width specimens not less than 500 mm long, not taken within 1 m of fabric ends. Conditioning and testing in standardized atmosphere per ISO 139; conditioning at least 16 h.
- Preparation methods: marking the visible weft with a thin marker or fraying to expose a complete weft yarn when visibility is poor.
- Measurements:
- Overall skew: single-triangle model measuring the maximal perpendicular distance (a) and useful width (b).
- Local skew: two- or three-triangle models for localized distortion.
- Weft/warp bow: determined per Annex A as greatest perpendicular deviation from a straight line joining ends.
- Reporting: include specimen, conditioning, measurement method, and calculated skew/bow values.
Practical applications and users
- Quality control in textile mills and finishing plants to ensure fabric meets appearance and make-up requirements (stripes, plaids, pattern matching).
- Garment and upholstery manufacturers to prevent fitting and assembly issues caused by distortion.
- Textile testing laboratories, procurement/inspection teams, and R&D groups verifying process changes (weaving, washing, finishing).
- Useful for suppliers and buyers to specify acceptable distortion limits in contracts.
Related standards
- ISO 139 - Standard atmospheres for conditioning and testing (normative reference used by EN ISO 13015:2013).
- Other textile test standards may be used in conjunction for comprehensive fabric characterization (refer to national laboratory bibliographies).
Keywords: EN ISO 13015:2013, ISO 13015, woven fabrics, fabric distortion measurement, skew and bow, weft, warp, textile testing, CEN.
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Frequently Asked Questions
EN ISO 13015:2013 is a standard published by the European Committee for Standardization (CEN). Its full title is "Woven fabrics - Distortion - Determination of skew and bow (ISO 13015:2013)". This standard covers: ISO 13015:2013 specifies a method for the determination of the distortion of a woven fabric in which the weft yarns are, in principle, perpendicular to the warp yarns.
ISO 13015:2013 specifies a method for the determination of the distortion of a woven fabric in which the weft yarns are, in principle, perpendicular to the warp yarns.
EN ISO 13015:2013 is classified under the following ICS (International Classification for Standards) categories: 59.080.30 - Textile fabrics. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 13015:2013 has the following relationships with other standards: It is inter standard links to EN 16315:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 13015:2013 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2013
7NDQLQH'HIRUPDFLMD8JRWDYOMDQMHSRãHYQRVWLLQXVORþHQRVWL,62
Woven fabrics - Distortion - Determination of skew and bow (ISO 13015:2013)
Gewebe - Verzerrung - Bestimmung des Schräg- und Bogenverzugs (ISO 13015:2013)
Étoffes tissées - Déformation - Détermination de l'écart angulaire et du cintrage (ISO
13015:2013)
Ta slovenski standard je istoveten z: EN ISO 13015:2013
ICS:
59.080.30 Tkanine Textile fabrics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 13015
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2013
ICS 59.080.30
English Version
Woven fabrics - Distortion - Determination of skew and bow (ISO
13015:2013)
Étoffes tissées - Déformation - Détermination de l'écart Gewebe - Verzerrung - Bestimmung des Schräg- und
angulaire et du cintrage (ISO 13015:2013) Bogenverzugs (ISO 13015:2013)
This European Standard was approved by CEN on 19 July 2013.
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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13015:2013: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 13015:2013) 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 February 2014, and conflicting national standards shall be withdrawn
at the latest by February 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.
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 13015:2013 has been approved by CEN as EN ISO 13015:2013 without any modification.
INTERNATIONAL ISO
STANDARD 13015
First edition
2013-08-01
Woven fabrics — Distortion —
Determination of skew and bow
Étoffes tissées — Déformation — Détermination de l’écart angulaire
et du cintrage
Reference number
ISO 13015:2013(E)
©
ISO 2013
ISO 13015:2013(E)
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
ISO 13015:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Conditioning and testing atmosphere . 2
7 Test specimens. 2
8 Procedure. 2
8.1 General . 2
8.2 Preparation by marking . 2
8.3 Preparation by fraying . 2
8.4 Determination of the overall skew and local skew . 2
9 Calculation and expression of the results . 6
9.1 Calculation for the overall skew . 6
9.2 Calculation with two triangles for local skew . 6
9.3 Calculation with three triangles for local skew . 7
10 Test report . 7
Annex A (normative) Weft bow and warp bow determination . 8
Bibliography .10
ISO 13015:2013(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. 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. 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.
The committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 24, Conditioning
atmospheres and physical tests for textile fabrics.
iv © ISO 2013 – All rights reserved
ISO 13015:2013(E)
Introduction
Textile and clothing manufacturers give a lot of importance to knowledge of the widthway distortion. In
the case of woven fabrics with patterns or in which the weft threads are rather visible, the appearance
of a textile article could be compromised.
With some rare exceptions, the two sets of threads in woven textile fabrics are intended to lie straight
and at right angles. If a fabric does not meet either of these requirements, it is described as distorted.
Difficulties in making up may then arise and the made-up article may fail to function properly. The
distortion may also detract from the appearance of fabric with checked patterns or coloured weft
effects such as plaids or stripes. It is therefore desirable to have a means of specifying and measuring
the distortion in woven fabric in terms of bow and skew.
INTERNATIONAL STANDARD ISO 13015:2013(E)
Woven fabrics — Distortion — Determination of skew and
bow
1 Scope
This International Standard specifies a method for the determination of the distortion of a woven fabric
in which the weft yarns are, in principle, perpendicular to the warp yarns.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 139, Textiles — St
...




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