EN ISO 10545-18:2022

SLOVENSKI STANDARD
01-junij-2022
Keramične ploščice - 18. del: Določanje vrednosti odbojnosti svetlobe (LRV) (ISO
10545-18:2022)
Ceramic tiles - Part 18: Determination of Light Reflectance Value (LRV) (ISO 10545-
18:2022)
Keramische Fliesen und Platten - Teil 18: Bestimmung des Lichtreflexionswertes (LRW)
(ISO 10545-18:2022)
Carreaux et dalles céramiques - Partie 18: Détermination de la valeur de réflectance
lumineuse (LRV) (ISO 10545-18:2022)
Ta slovenski standard je istoveten z: EN ISO 10545-18:2022
ICS:
91.100.23 Keramične ploščice Ceramic tiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 10545-18
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2022
EUROPÄISCHE NORM
ICS 91.100.23
English Version
Ceramic tiles - Part 18: Determination of Light Reflectance
Value (LRV) (ISO 10545-18:2022)
Carreaux et dalles céramiques - Partie 18: Keramische Fliesen und Platten - Teil 18: Bestimmung
Détermination de la valeur de réflectance lumineuse des Lichtreflexionswertes (LRW) (ISO 10545-18:2022)
(LRV) (ISO 10545-18:2022)
This European Standard was approved by CEN on 13 March 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 10545-18:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10545-18:2022) has been prepared by Technical Committee ISO/TC 189
"Ceramic tile" in collaboration with Technical Committee CEN/TC 67 “Ceramic tiles” the secretariat of
which is held by UNI.
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 October 2022, and conflicting national standards shall
be withdrawn at the latest by October 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.
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 10545-18:2022 has been approved by CEN as EN ISO 10545-18:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 10545-18
First edition
2022-03
Ceramic tiles —
Part 18:
Determination of light reflectance
value (LRV)
Carreaux et dalles céramiques —
Partie 18: Détermination de la valeur de réflectance lumineuse (LRV)
Reference number
ISO 10545-18:2022(E)
ISO 10545-18:2022(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 10545-18:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Type of instrument . 2
5.2 Instrument setup . 2
5.3 Instrument calibration and standards . 2
6 Preparation of test specimens . 3
6.1 Solid coloured tiles . 3
6.2 Multi-coloured, non-uniform shade, speckled or textured surface tile . 3
7 Test . 3
7.1 Measurement on solid coloured surfaces . 3
7.2 Measurement on multi-coloured surfaces . 3
7.3 Measurement on non-uniform shade, speckled or textured surface . 4
8 Test report . 4
Bibliography . 6
iii
ISO 10545-18:2022(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 189, Ceramic tile, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 67, Ceramic tiles, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 10545 series can be found on the ISO website.
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 10545-18:2022(E)
Ceramic tiles —
Part 18:
Determination of light reflectance value (LRV)
1 Scope
The objective of this document is to define a test method to determine the light reflectance value (LRV)
of ceramic tiles, including mosaic tiles.
It is applicable to solid-coloured, multicoloured and non-uniform shade tile surfaces including tile with
flame effects, speckled or textured with different types of finishing.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
solid coloured surface
surface with colour uniformity and same shade value
3.2
multi-coloured surface
surface formed by distinct areas of different colour, which when viewed from a distance of 3 m, remain
distinct, or surface formed from small colour specks, which when viewed from a distance of 1 m,
assume the appearance of one colour
3.3
non-uniform shade surface
surface with a certain shade variability
3.4
speckled surface
surface or covered with small marks, spots, or shake
3.5
textured surface
surface that causes extreme angular dependences of reflected light and that has a superficial texture
with maximum peak-valley distance <2 mm
ISO 10545-18:2022(E)
3.6
light reflectance value
LRV
value equivalent to the CIE tristimulus value Y, also known as the luminance factor
Note 1 to entry: LRV is expressed as a percent and should include reference to the associated CIE observer angle,
CIE illuminant and measurement conditions used to determine the value.
4 Principle
The test in question is the determination of the amount of visible light reflected by the surface product
in each direction; the measurement of this reflected light at different wavelengths in visible range,
weighted for the sensitivity of light of the human eye, is the light reflectance value.
5 Apparatus
5.1 Type of instrument
Any reflectance-type spectrophotometer or tristimulus colorimeter capable of colour measurements
and data colour transformation into CIE tristimulus value, X, Y and Z.
This instrument shall have a reproducibility of 1 unit ΔE CIE L*a*b*, and repeatability of σ = ± 0,2 base
...