EN ISO 13468-1:2019

SLOVENSKI STANDARD
01-oktober-2019
Nadomešča:
SIST EN ISO 13468-1:1999
Polimerni materiali - Določevanje celotne prepustnosti svetlobe prozornih
materialov - 1. del: Instrument z enim žarkom (ISO 13468-1:2019)
Plastics - Determination of the total luminous transmittance of transparent materials -
Part 1: Single-beam instrument (ISO 13468-1:2019)
Kunststoffe - Bestimmung des totalen Lichttransmissionsgrades von transparenten
Materialien - Teil 1: Einstrahlinstrument (ISO 13468-1:2019)
Plastiques - Détermination du facteur de transmission du flux lumineux total des
matériaux transparents - Partie 1: Instrument à faisceau unique (ISO 13468-1:2019)
Ta slovenski standard je istoveten z: EN ISO 13468-1:2019
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 13468-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 13468-1:1996
English Version
Plastics - Determination of the total luminous
transmittance of transparent materials - Part 1: Single-
beam instrument (ISO 13468-1:2019)
Plastiques - Détermination du facteur de transmission Kunststoffe - Bestimmung des totalen
du flux lumineux total des matériaux transparents - Lichttransmissionsgrades von transparenten
Partie 1: Instrument à faisceau unique (ISO 13468- Materialien - Teil 1: Einstrahlinstrument (ISO 13468-
1:2019) 1:2019)
This European Standard was approved by CEN on 18 June 2019.

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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13468-1:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13468-1:2019) 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 January 2020, and conflicting national standards shall
be withdrawn at the latest by January 2020.
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 13468-1:1996.
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 13468-1:2019 has been approved by CEN as EN ISO 13468-1:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 13468-1
Second edition
2019-06
Plastics — Determination of the
total luminous transmittance of
transparent materials —
Part 1:
Single-beam instrument
Plastiques — Détermination du facteur de transmission du flux
lumineux total des matériaux transparents —
Partie 1: Instrument à faisceau unique
Reference number
ISO 13468-1:2019(E)
©
ISO 2019
ISO 13468-1:2019(E)
© ISO 2019
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
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

ISO 13468-1:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Apparatus . 2
5 Test specimens. 4
6 Conditioning . 4
7 Procedure. 4
8 Expression of results . 4
9 Precision . 5
10 Test report . 5
Annex A (informative) Use of a compensation port to increase the efficiency of an
integrating sphere . . 7
Bibliography . 9
ISO 13468-1:2019(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 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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This second edition cancels and replaces the first edition (ISO 13468-1:1996), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— the format of figures has been revised;
— the normative references have been revised;
— editorial changes have been applied.
A list of all parts in the ISO 13468 series can be found on the ISO website.
iv © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 13468-1:2019(E)
Plastics — Determination of the total luminous
transmittance of transparent materials —
Part 1:
Single-beam instrument
1 Scope
This document covers the determination of the total luminous transmittance, in the visible region of the
spectrum, of planar transparent and substantially colourless plastics, using a single-beam photometer
with a specified CIE Standard light source and photodetector. This document cannot be used for plastics
which contain fluorescent materials.
This document is applicable to transparent moulding materials, films and sheets not exceeding 10 mm
in thickness.
NOTE 1 Total luminous transmittance can also be determined by a double-beam spectrophotometer as in
ISO 13468-2. This document, however, provides a simple but precise, practical and quick determination. This
method is suitable for use not only for analytical purposes but also for quality control.
NOTE 2 Substantially colourless plastics include those which are faintly tinted.
NOTE 3 Specimens more than 10 mm thick can be measured provided the instrument can accommodate them,
but the results might not be comparable with those obtained using specimens less than 10 mm thick.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291, Plastics — Standard atmospheres for conditionin
...