EN ISO 10545-18:2022

Ceramic tiles - Part 18: Determination of Light Reflectance Value (LRV) (ISO 10545-18:2022)

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.

Keramische Fliesen und Platten - Teil 18: Bestimmung des Lichtreflexionswertes (LRW) (ISO 10545-18:2022)

Die Zielsetzung dieses Dokuments ist die Festlegung eines Prüfverfahrens zur Bestimmung des Licht-reflexionswertes (LRW) von keramischen Fliesen und Platten, einschließlich Mosaikfliesen.
Es gilt für einfarbige, mehrfarbige und ungleichmäßig schattierte Oberflächen von Fliesen und Platten, ein¬schließlich Fliesen und Platten mit Flammeneffekt, gesprenkelter oder strukturierter Fliesen und Platten und solcher mit unterschiedlichen Oberflächenausführungen.

Carreaux et dalles céramiques - Partie 18: Détermination de la valeur de réflectance lumineuse (LRV) (ISO 10545-18:2022)

L'objectif du prèsent document est de définir une méthode d'essai permettant de déterminer la valeur de réflectance lumineuse (LRV) des carreaux céramiques, y compris celle des carreaux de mosaïque.
Cette méthode s'applique aux carreaux de couleur unie ou aux surfaces multicolores, avec des effets de flammes, mouchetés ou texturés, avec différents types de finition.

Keramične ploščice - 18. del: Določanje vrednosti odbojnosti svetlobe (LRV) (ISO 10545-18:2022)

Cilj tega dokumenta je opredeliti preskusno metodo za določitev vrednosti odbojnosti svetlobe (LRV) keramičnih ploščic in tudi mozaičnih ploščic.
Uporablja se za enobarvne, večbarvne in neenakomerne površine ploščic, vključno s ploščicami z učinkom plamena, pikaste ali teksturirane z različnimi vrstami zaključne obdelave.

General Information

• Status: Published
• Publication Date: 26-Apr-2022
• Withdrawal Date: 30-Oct-2022
• ICS: 91.100.23 - Ceramic tiles
• Technical Committee: CEN/TC 67 - Ceramic tiles
• Drafting Committee: CEN/TC 67/WG 1 - Test methods
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 27-Apr-2022
• Completion Date: 27-Apr-2022
• Ref Project: SIST EN ISO 10545-18:2022 - Ceramic tiles - Part 18: Determination of Light Reflectance Value (LRV) (ISO 10545-18:2022)

Overview

EN ISO 10545-18:2022 - Ceramic tiles, Part 18 - defines a laboratory test method to determine Light Reflectance Value (LRV) for ceramic tiles, including mosaic tiles. LRV is equivalent to the CIE tristimulus value Y (luminance factor) and is expressed as a percentage. The standard applies to solid‑coloured, multicoloured, non‑uniform shade, speckled, textured and flame‑effect tile surfaces with different finishes.

Key topics and requirements

• Scope and terms: Defines surface types (solid, multi‑coloured, non‑uniform shade, speckled, textured) and LRV as the CIE Y value.
• Principle: Measure visible light reflected by the tile across wavelengths weighted to human eye sensitivity to yield LRV.
• Instruments: Any reflectance spectrophotometer or tristimulus colorimeter capable of producing CIE X, Y, Z. Required performance: reproducibility ~1 ΔE (CIE Lab*) and repeatability σ = ±0.2 (five readings). Measurement area ≥ 8 mm diameter.
• Measurement conditions: Options include SCI (specular component included) with 2° or 10° observer and illuminants CIE D65, F2, A. Instruments must be calibrated per manufacturer guidance. Primary reference is barium sulfate; calibrated working standards (white glass, porcelain enamel, glazed tile) are acceptable.
• Specimen preparation:
  • Solid tiles: at least three tiles, one specimen per tile.
  • Multi‑coloured/non‑uniform/textured: select specimens representative of colour range; minimum numbers depend on tile area (see Table 1 in the standard). Mosaic: minimum 20 tesserae. Clean with a solvent (e.g., ethanol 96 %) and dry before testing.
  • Wet testing allowed using grade 2 water (ISO 3696) with specimens kept wet for ≥5 minutes.
• Test procedure: Record CIE Y (LRV). For solid surfaces, take ≥4 readings per specimen positioned ~20 ± 5 mm from edges. For multi‑coloured surfaces, take readings per distinct colour area and calculate an area‑weighted average LRV.

Applications

• Product quality control and specification for tile manufacturers.
• Material selection for architects, interior designers, and lighting designers where surface reflectance influences daylighting, visual comfort and perceived brightness.
• Procurement and specification documents that require quantified LRV values for contrast, wayfinding, or aesthetic matching.
• Lab testing and certification bodies validating tile LRV claims.

Who uses this standard

• Tile manufacturers and R&D laboratories
• Test laboratories and certification bodies
• Architects, specifiers, and lighting consultants
• Interior designers and product compliance teams

Related standards

• Other parts of the ISO 10545 series (ceramic tile test methods) - consult the ISO catalogue for complementary test methods and requirements.

Keywords: EN ISO 10545-18:2022, LRV, Light Reflectance Value, ceramic tiles, mosaic tiles, CIE Y, spectrophotometer, SCI, CIE D65, tile testing, colour measurement.

Standards Content (Sample)

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: [phone]
Email: [e-mail]
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
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