1、May 2017 English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.220.60!%eQ7“2664620www.din.deDIN E
2、N 13523-22Coil coated metals Test methods Part 22: Colour difference Visual comparison;English version EN 1352322:2017,English translation of DIN EN 13523-22:2017-05Bandbeschichtete Metalle Prfverfahren Teil 22: Farbabstand Visueller Vergleich;Englische Fassung EN 1352322:2017,Englische bersetzung v
3、on DIN EN 13523-22:2017-05Tles prlaques Mthodes dessai Partie 22: Diffrence de couleur Comparaison visuelle;Version anglaise EN 1352322:2017,Traduction anglaise de DIN EN 13523-22:2017-05SupersedesDIN EN 1352322:201007www.beuth.deDocument comprises 11 pagesDTranslation by DIN-Sprachendienst.In case
4、of doubt, the German-language original shall be considered authoritative.05.17 DIN EN 13523-22:2017-05 2 A comma is used as the decimal marker. National foreword This document (EN 13523-22:2017) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany), W
5、orking Group WG 9 “Testing of coil coated metals” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Beschichtungsstoffe und Beschichtungen (DIN Standards Committee Coatings and Coating Materials), Working Committee NA 002-00-07 AA “General t
6、est methods for coating materials and coatings”. The European Standards referred to in this document have been published as DIN EN or DIN EN ISO Standards with the same number. Amendments This standard differs from DIN EN 13523-22:2010-07 as follows: a) a reference to EN 13523-0 concerning condition
7、ing of the test panels has been added; b) requirements for ambient and panel temperature and relative humidity during measurement have been rendered more precise; c) the text has been editorially revised and normative references have been updated. Previous editions DIN EN 13523-22: 2003-09, 2010-07
8、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13523-22 February 2017 ICS 25.220.60 Supersedes EN 13523-22:2010English Version Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison Tles prlaques - Mthodes dessai - Partie 22: Diffrence de couleur - Comparaison visue
9、lle Bandbeschichtete Metalle - Prfverfahren - Teil 22: Farbabstand - Visueller Vergleich This European Standard was approved by CEN on 9 January 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
10、 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, Germ
11、an). 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
12、, 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey
13、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 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref.
14、 No. EN 13523-22:2017 E2 Contents Page European foreword . 3 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Principle . 6 5 Illumination for colour matching 6 5.1 Natural daylight . 6 5.2 Artificial daylight 6 5.3 Colour-matching booth . 6 6 Observer . 7 7 Sampling . 7 8 Test speci
15、mens and reference standards . 7 9 Procedure. 7 9.1 General 7 9.2 Day-to-day routine 7 9.3 Referee procedure 8 10 Expression of results 8 11 Precision . 8 12 Test report . 8 Bibliography 9 EN 13523-22:2017 (E) DIN EN 13523-22:2017-05 3 European foreword This document (EN 13523-22:2017) has been prep
16、ared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN. 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 August 2017, and conflicting national standa
17、rds shall be withdrawn at the latest by August 2017. 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 13523-22:2010. The m
18、ain changes are: a) a reference to EN 13523-0 concerning conditioning of the test panels was added; b) the requirement for ambient and panel temperature and relative humidity during measurement has been stated more precisely; c) the text was revised editorially and the normative references were upda
19、ted. The EN 13523 series, Coil 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: Adhesi
20、on after indentation (cupping test) 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: Resi
21、stance to scratching Part 13: Resistance to accelerated ageing by the use of heat EN 13523-22:2017 (E) DIN EN 13523-22:2017-05 4 Part 14: Chalking (Helmen method) Part 15: Metamerism Part 16: Resistance to abrasion Part 17: Adhesion of strippable films Part 18: Resistance to staining Part 19: Panel
22、design and method of atmospheric exposure 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: Resista
23、nce to humidity Part 26: Resistance 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 organizations of the following countr
24、ies are bound to implement this European 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, Pola
25、nd, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 13523-22:2017 (E) DIN EN 13523-22:2017-05 5 1 Scope This part of the EN 13523 series specifies the procedure for determining the difference in the colour of an organic coating on a metall
26、ic substrate by visual comparison against a standard using either diffuse natural daylight or artificial daylight in a standard booth. NOTE Results might differ between natural and artificial daylight. It might be that two colour specimens will match in daylight but not under another light source. T
27、his phenomenon is known as metamerism (see EN 13523-15). If a metameric match is to be reported in objective terms, spectrophotometric measurements (using CIE Standard Illuminants D65 and A) should be made, in accordance with EN 1352315. No statement is made about either the precision or the accurac
28、y of this procedure since the results derived are neither in numerical form nor do they provide a pass/fail evaluation in objective terms. Therefore, this procedure should only be used where the use of colour measuring instruments is not recommendable (evaluation of colour matches, inspection of met
29、allic colours, etc.). The standardization of such visual comparisons, by light sources, illuminating and viewing geometry and specimen size, provides for improved uniformity of results. This practice is essential for critical colour matching and is highly recommended for colour inspections. 2 Normat
30、ive references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) a
31、pplies. EN 13523-0:2014, Coil coated metals Test methods Part 0: General introduction 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 colour sensation resulting from the visual perception of light of a given spectr
32、al composition by the human eye Note 1 to entry: The use of the German term “Farbe” alone, i.e. not in combination of words, for coating materials is deprecated. Note 2 to entry: A colour is characterized by hue, chroma, and lightness. SOURCE: EN ISO 4618:2014, 2.58 3.2 metamerism phenomenon charact
33、erized 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 SOURCE: EN 13523-15:2015, 3.1 EN 13523-22:2017 (E) DIN EN 13523-22:2017-05 6 4 Principle The colour of the specime
34、n under test is visually compared with a standard prepared under similar conditions. The comparison is carried out using either diffuse natural daylight or artificial daylight, in a standard booth. 5 Illumination for colour matching 5.1 Natural daylight Light from a moderately overcast northern sky
35、(for countries on the northern hemisphere). Reflection from strongly coloured neighbouring objects as well as direct sunlight should be excluded. The level of illumination shall be at least 2 000 lx and shall be uniform over the viewing area. 5.2 Artificial daylight The evaluation area shall be shie
36、lded from external light, preferably by a permanent structure (lighting cabinet). The spectral characteristics of the light source should be equivalent to those of the CIE Standard Illuminant D65. NOTE DIN 61732, BS 9501 and BS 9502 provide procedures for measuring the actual spectral energy distrib
37、ution over the viewed area. The photometric conditions require an illumination between 1 000 lx (for very light colours) and 4 000 lx (for very dark colours). The manufacturer of the artificial light source shall disclose the number of running hours which his product can be expected to conform to th
38、is European Standard. 5.3 Colour-matching booth See also EN ISO 3668. The colour-matching booth shall be an enclosure from which external light is excluded and which is illuminated by a light source giving a spectral power distribution falling on the test specimen, approximating to that of CIE Stand
39、ard Illuminant D65. The interior of the booth for general use shall be painted a matt neutral grey (the amount of a* and b* shall be less than 1,0) with a lightness L* of about 45 to 55 (Munsell N4 to N5, NCS S 5500-N to S 6500-N). However, when mainly light colours and near-white colours are to be
40、compared, the interior of the booth may be painted so as to have a lightness L* of about 65 (Munsell N6, NCS S 4500-N) or higher in order to give a lower brightness contrast with the colour to be examined. When mainly dark colours are to be compared, the interior of the booth may be painted matt bla
41、ck with a lightness L* of about 25 (Munsell matt black, NCS S 9000-N). The CIELAB values stated are for the D65/10 condition and measured using 45:0 as a reference. Alternatively, de:8 may be used for determination of colour values. NOTE L*, a* and b* refer to the CIELAB system (EN ISO 11664-4). To
42、secure an appropriate surrounding field for colour comparison, the table surface in the booth shall be covered by a neutral grey panel, its luminance factor being chosen to be similar to that of the samples to be compared. A diffusing screen shall normally be used to avoid the reflection of an image
43、 of the lamp from the test specimen. The spectral distribution properties of the lighting device shall include the spectral transmission of the screen. EN 13523-22:2017 (E) DIN EN 13523-22:2017-05 7 6 Observer In order to obtain the best possible results, the following is recommended: a) it should b
44、e ensured that the observer has a good colour vision. This can be checked by a Farnsworth test; b) observers should wear clothing of a neutral colour; c) some rest periods should be allowed between the evaluation of widely differing matches as well as between long sessions. 7 Sampling Shall be accor
45、ding to EN 13523-0. 8 Test specimens and reference standards 8.1 Standards as well as test specimens shall be uniform in colour and gloss and free of imperfections and should preferably be flat. The preferred size of test specimens is about 150 mm 100 mm. Specimens of a size at least larger than 120
46、 mm 50 mm should be used. 8.2 The standard coating shall have an acceptable light fastness, and its gloss and texture shall approximate those of the coating to be evaluated. Since application, curing and film thickness contribute to the resulting colour, test specimens should be pre-treated and coat
47、ed (including application of a priming coat, if required) as specified. The dry film thickness should be determined in accordance with EN 135231. 9 Procedure 9.1 General Evaluate the colour difference at ambient temperature. For more accurate comparisons, as required for instance in case of dispute,
48、 the ambient and panel temperature shall be (23 2) C and the relative humidity (50 5) %, in accordance with EN 23270. Conditioning is carried out in accordance with EN 13523-0:2014, Clause 6. 9.2 Day-to-day routine Evaluate each pair of test specimens under natural or artificial daylight. Place the
49、specimens and the standard on a table or bench at the required distance from the light source to obtain the level of illumination required. The specimens and the standard should be placed in the same plane. View the specimens and the standard at a distance of approximately 500 mm. At this distance, the observer range should be 10 in accordance with ISO 11664-1. To improve the accuracy
