EN ISO 489:2022

SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN ISO 489:2000
Polimerni materiali - Določanje lomnega količnika (ISO 489:2022)
Plastics - Determination of refractive index (ISO 489:2022)
Kunststoffe - Bestimmung des Brechungsindex (ISO 489:2022)
Plastiques - Détermination de l’indice de réfraction (ISO 489:2022)
Ta slovenski standard je istoveten z: EN ISO 489:2022
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 489
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 489:1999
English Version
Plastics - Determination of refractive index (ISO 489:2022)
Plastiques - Détermination de l'indice de réfraction Kunststoffe - Bestimmung des Brechungsindex (ISO
(ISO 489:2022) 489:2022)
This European Standard was approved by CEN on 8 February 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 489:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 489:2022) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
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 September 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 489:1999.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 489:2022 has been approved by CEN as EN ISO 489:2022 without any modification.

INTERNATIONAL ISO
STANDARD 489
Third edition
2022-03
Plastics — Determination of refractive
index
Plastiques — Détermination de l'indice de réfraction
Reference number
ISO 489:2022(E)
ISO 489:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 489:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus and materials .1
4.1 Method A . 1
4.2 Method B . 2
5 Preparation of test specimens . 3
5.1 Method A . 3
5.2 Method B . 3
5.3 Required number of specimens or measurements . 3
6 Conditioning . 4
7 Procedure .4
7.1 Method A . 4
7.1.1 General . 4
7.1.2 Transparent sheet . 4
7.1.3 Film . 6
7.1.4 Anisotropic material . 6
7.1.5 Translucent, coloured and opaque material . 7
7.2 Method B . 8
8 Precision . 9
9 Test report . 9
Annex A (informative) Precision data .10
Bibliography .12
iii
ISO 489:2022(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
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 489:1999), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— in the Scope, the description about the precision of the explanation of the method A and method B
has been deleted;
— normative references have been updated;
— the definition of the temperature control device of method A has been changed;
— the text of Clause 8, Precision, has been moved to Annex A;
— in Clause 9, the type of the immersing liquid used in method B has been added;
— the document has been editorial revised.
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.
iv
INTERNATIONAL STANDARD ISO 489:2022(E)
Plastics — Determination of refractive index
1 Scope
This document specifies two test methods for determining the refractive index of plastics, namely:
— Method A: a refractometric method for measuring the refractive index of moulded parts, cast or
extruded sheet or film, by means of a refractometer. It is applicable not only to isotropic transparent,
translucent, coloured or opaque materials but also to anisotropic materials.
— Method B: an immersion method (making use of the Becke line phenomenon) for determining
the refractive index of powdered or granulated transparent materials by means of a microscope.
Monochromatic light, in general, is used to avoid dispersion effects.
NOTE The refractive index is a fundamental property which can be used for checking purity and
composition, for the identification of materials and for the design of optical parts. The change in refractive index
with temperature can give an indication of transition points of materials.
...