EN 13721:2023

SLOVENSKI STANDARD
01-julij-2023
Nadomešča:
SIST EN 13721:2004
Pohištvo - Ocenjevanje odbojnosti površine
Furniture - Assessment of the surface reflectance
Möbel - Bewertung des Oberflächenreflexionsgrades
Ameublement - Évaluation de la luminance lumineuse des surfaces
Ta slovenski standard je istoveten z: EN 13721:2023
ICS:
97.140 Pohištvo Furniture
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13721
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2023
EUROPÄISCHE NORM
ICS 97.140 Supersedes EN 13721:2004
English Version
Furniture - Assessment of the surface reflectance
Ameublement - Évaluation de la luminance lumineuse Möbel - Bewertung des Oberflächenreflexionsgrades
des surfaces
This European Standard was approved by CEN on 17 March 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13721:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 5
5 Viewing/illumination condition geometry . 5
6 Standard colorimetric observer and standard illuminant . 6
7 Equipment . 6
7.1 General. 6
7.2 Conditioning chamber . 6
7.3 Cleaning cloth . 6
8 Preparation and conditioning of test units/test panels. 7
9 Instrument calibration . 7
9.1 Calibration . 7
9.2 Reference scale . 7
9.3 Reference standards (primary and working) . 7
10 Test Procedure . 7
11 Test report . 8
Bibliography . 9

European foreword
This document (EN 13721:2023) has been prepared by Technical Committee CEN/TC 207 “Furniture”,
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 2023, and conflicting national standards shall
be withdrawn at the latest by October 2023.
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 13721:2004.
The main changes compared to the previous edition are listed below:
— revised scope: test method is not applicable to some metallic paints and pearly coatings;
— normative references updated;
— additional terms and definitions “final inspection”, “colorants control” added;
— revised Table 1 Recommended measurement geometries;
— additional 7.2 Conditioning chamber and 7.3 Cleaning cloth added;
— document editorially revised in its entirety.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Türkiye and the United
Kingdom.
1 Scope
This document specifies a method for the assessment of the surface reflectance of furniture surfaces and
relates to rigid surfaces of all finished products regardless of materials, except for finishes on leather and
fabrics, which are excluded from this document.
This document is applicable to the test, intended to be carried out on finished furniture, but can be carried
out on test panels of the same material, finished in an identical manner to the finished product, and of a
size sufficient to meet the requirements of the test.
The test method is not applicable to some metallic paints and pearly coatings.
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.
EN ISO/CIE 11664-1:2019, Colorimetry - Part 1: CIE standard colorimetr
...