1、BSI Standards PublicationBS EN 13523-15:2015Coil coated metals TestmethodsPart 15: MetamerismBS EN 13523-15:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13523-15:2015.It supersedes BS EN 13523-15:2002 which is withdrawn.The UK participation in its prepar
2、ation was entrusted to TechnicalCommittee STI/21, Paint systems and surface preparation for metallicsubstrates.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. User
3、s are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 84652 6ICS 17.180.20; 25.220.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the auth
4、ority of theStandards Policy and Strategy Committee on 31 July 2015.Amendments issued since publicationDate Text affectedBS EN 13523-15:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13523-15 July 2015 ICS 25.220.60 Supersedes EN 13523-15:2002English Version Coil coated metals - Test metho
5、ds - Part 15: Metamerism Tles prlaques - Mthodes dessai - Partie 15: Mtamrisme Bandbeschichtete Metalle - Prfverfahren - Teil 15: Metamerie This European Standard was approved by CEN on 27 May 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
6、ons 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 i
7、n 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 standar
8、ds bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove
9、nia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved
10、worldwide for CEN national Members. Ref. No. EN 13523-15:2015 EBS EN 13523-15:2015EN 13523-15:2015 (E) 2 Contents Page European foreword .3 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle 5 5 Apparatus .6 5.1 Spectrophotometer (see EN 13523-3) 6 6 Sampling .6 7 Test panels
11、.6 8 Procedure .6 8.1 Calibration 6 8.2 Measurement 6 9 Expression of results 7 10 Precision .7 11 Test report 8 Bibliography 9 BS EN 13523-15:2015EN 13523-15:2015 (E) 3 European foreword This document (EN 13523-15:2015) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the
12、 secretariat of which is held by DIN. This document supersedes EN 13523-15:2002. 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 2016, and conflicting national standards shall be withdrawn
13、 at the latest by January 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. The main technical changes are: a) the specification c
14、oncerning the test illuminant of the spectrophotometer was amended; b) the formulas in Clause 9 were aligned with the current standards for colorimetry (EN ISO 11664-4) and metamerism index (DIN 6172); c) a reference to EN 13523-0 concerning conditioning of the test panels was added. EN 13523, Coil
15、coated metals Test methods, consists of the following parts: Part 0: General introduction Part 1: Film thickness Part 2: Gloss Part 3: Colour difference Instrumental comparison Part 4: Pencil hardness Part 5: Resistance to rapid deformation (impact test) Part 6: Adhesion after indentation (cupping t
16、est) Part 7: Resistance to cracking on bending (T-bend test) Part 8: Resistance to salt spray (fog) Part 9: Resistance to water immersion Part 10: Resistance to fluorescent UV radiation and water condensation Part 11: Resistance to solvents (rubbing test) Part 12: Resistance to scratching Part 13: R
17、esistance to accelerated ageing by the use of heat Part 14: Chalking (Helmen method) BS EN 13523-15:2015EN 13523-15:2015 (E) 4 Part 15: Metamerism Part 16: Resistance to abrasion Part 17: Adhesion of strippable films Part 18: Resistance to staining Part 19: Panel design and method of atmospheric exp
18、osure testing Part 20: Foam adhesion Part 21: Evaluation of outdoor exposed panels Part 22: Colour difference Visual comparison Part 23: Resistance to humid atmospheres containing sulfur dioxide Part 24: Resistance to blocking and pressure marking Part 25: Resistance to humidity Part 26: Resistance
19、to condensation of water Part 27: Resistance to humid poultice (Cataplasm test) Part 29: Resistance to environmental soiling (Dirt pick-up and striping) According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this Euro
20、pean Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slo
21、venia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13523-15:2015EN 13523-15:2015 (E) 5 1 Scope This part of EN 13523 defines terms of the procedure for determining the metamerism of a colour match of an organic coating on a metallic substrate. When two colour specimens have iden
22、tical spectral reflection curves, they are matching under any illuminant irrespective of its spectral characteristics. This is termed a “spectral match”. It is also possible for two colour specimens having different spectral reflection curves to match visually under a given light source but not to m
23、atch under another light source with different spectral characteristics; such matches are termed “metameric”. One quantitative description of metamerism is the so-called “metamerism index”. The information of the metamerism index is of limited value where E (instrumental colour difference for a give
24、n illuminant, see EN 13523-3) is 0,5. The metamerism index is not suited for determining the absolute colour difference or colour constancy of a given specimen at change of illuminant. The colour difference under the reference illuminant is to be measured in colour coordinates L*, a* and b* (see EN
25、13523-3). Excluded from this method are organic coatings producing fluorescence and/or which are multicoloured, pearlescent or metallic. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dat
26、ed references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13523-0:2014, Coil coated metals - Test methods - Part 0: General introduction EN 13523-3, Coil coated metals - Test methods - Part 3: Colour di
27、fference - Instrumental comparison EN 23270, Paints and varnishes and their raw materials - Temperatures and humidities for conditioning and testing (ISO 3270) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13523-0 and the following apply. 3.1 metame
28、rism phenomenon characterized by the difference in colour observed when two specimens visually matching under a given light source are viewed under another light source with different spectral characteristics 3.2 metamerism index calculated value of the degree to which a colour difference between tw
29、o specimens changes when using different illuminants 4 Principle The colour difference of a colour match is determined under different illuminants. From the measured colour coordinates L*, a* and b* the metamerism index is calculated. BS EN 13523-15:2015EN 13523-15:2015 (E) 6 5 Apparatus 5.1 Spectro
30、photometer (see EN 13523-3) The spectrophotometer shall permit L*, a* and b* colour coordinates to be ascertained at least under standard illuminant D65 and 10 to standard observer and standard illuminant A and 10 to standard observer. Other test illuminants may be used, in which case it shall be st
31、ated in the test report. The circular measuring aperture shall have a minimum diameter of 10 mm. Illumination/viewing geometry: Geometries 45:0 or 0:45 are preferred but geometry d:8is also allowed. Any further conditions shall be the subject of a particular agreement. The spectrophotometer shall de
32、tect as little specular reflected light as possible. 6 Sampling See EN 13523-0. 7 Test panels See EN 13523-0. The surfaces to be measured shall be at least as large as the area of the measuring aperture and shall be flat against the measuring aperture. 8 Procedure 8.1 Calibration The apparatus shall
33、 be used in accordance with the manufacturers instructions, particularly with regard to warm-up time and calibration. 8.2 Measurement Condition the test samples in accordance with EN 13523-0:2014, Clause 6. Measure the colour coordinates at ambient temperature ensuring that the temperature is within
34、 the range stated by the manufacturer of the apparatus. In cases of dispute, the measurement shall be carried out under conditions of (23 2) C and a relative humidity of (50 5) %, in accordance with EN 23270. One of the specimens shall be designated the reference specimen. First measure the colour c
35、oordinates of the reference specimen and then the colour coordinates of the test specimen. BS EN 13523-15:2015EN 13523-15:2015 (E) 7 9 Expression of results Calculate the metamerism index MI, using the following formula: 2/12*r*t2*r*t2*r*t)()()(MI bbaaLL += where subscript t is the test illuminant b
36、eing used, e.g. standard illuminant A, or a “warm white” type fluorescent lamp illuminant; subscript r is the reference illuminant (standard illuminant D65); *tstd,*tspl,*t LLL = *rstd,*rspl,*r LLL = * *t spl,t std,t a aa= *rstd,*rspl,*r aaa = *tstd,*tspl,*t bbb = *rstd,*rspl,*r bbb = where subscrip
37、t std is the reference specimen (standard); subscript spl is the test specimen (sample). 10 Precision No precision data are currently available. BS EN 13523-15:2015EN 13523-15:2015 (E) 8 11 Test report The test report shall contain at least the following information: a) all details necessary to iden
38、tify the product tested; b) a reference to this part of EN 13523 (EN 13523-15); c) the type of instrument used; d) the illuminants used; e) the geometry used; f) the metamerism index, as indicated in Clause 9; g) the components of the metamerism index, if required; h) any deviation from the test met
39、hod specified; i) the date of the test. BS EN 13523-15:2015EN 13523-15:2015 (E) 9 Bibliography 1 EN 1396, Aluminium and aluminium alloys - Coil coated sheet and strip for general applications - Specifications 2 EN 10169, Continuously organic coated (coil coated) steel flat products Technical deliver
40、y conditions 3 EN ISO 11664 (all parts), Colorimetry (ISO 11664) 4 ISO 18314 (all parts), Analytical colorimetry 5 CIE 15, Colorimetry 6 DIN 6172:2014, Metamerism-index for pairs of samples at change of illuminant This page deliberately left blankThis page deliberately left blankBSI is the national
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