1、BS EN13523-22:2010ICS 25.220.60NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDCoil coated metals Test methodsPart 22: Colour difference VisualcomparisonCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo repro
2、duction or networking permitted without license from IHS-,-,-This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 BSI 2010ISBN 978 0 580 65395 7Amendments/corrigenda issued since publicationDate CommentsBS EN 13523-22:2010National foreword
3、This British Standard is the UK implementation of EN 13523-22:2010. Itsupersedes BS EN 13523-22:2003 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/27, Paint systems for metallic substrates.A list of organizations represented on this committee can
4、be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Copyright European Committee for Standardiz
5、ation Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 13523-22:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13523-22 March 2010 ICS 25.220.60 Supersedes EN 13523-22:2003English Version Coil coated metals - Tes
6、t methods - Part 22: Colour difference -Visual comparison Tles prlaques - Mthodes dessai - Partie 22: Diffrence de couleur - Comparaison visuelle Bandbeschichtete Metalle - Prfverfahren - Teil 22: Farbabstand - Visueller Vergleich This European Standard was approved by CEN on 20 February 2010. CEN m
7、embers 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 applic
8、ation to the CEN 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 Management Centre ha
9、s 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, P
10、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and b
11、y any means reserved worldwide for CEN national Members. Ref. No. EN 13523-22:2010: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 13523-22:2010EN 13523-22:2010 (E) 2 Con
12、tents Page Foreword 31 Scope 52 Normative references 53 Terms and definitions . 54 Principle 65 Illumination for colour matching 65.1 Natural daylight 65.2 Artificial daylight 65.3 Colour-matching booth . 66 Observer . 67 Sampling . 78 Test specimens and reference standards . 79 Procedure . 79.1 Gen
13、eral 79.2 Day-to-day routine . 79.3 Referee procedure . 810 Expression of results 811 Precision . 812 Test report 8Bibliography 9Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-B
14、S EN 13523-22:2010EN 13523-22:2010 (E) 3 Foreword This document (EN 13523-22:2010) has been prepared 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
15、 identical text or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. 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 no
16、t be held responsible for identifying any or all such patent rights. This document supersedes EN 13523-22:2003. The main changes are: a) the text was revised editorially and the normative references were updated. EN 13523, Coil coated metals Test methods, consists of the following parts: Part 0: Gen
17、eral introduction and list of test methods Part 1: Film thickness Part 2: Specular 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 test) Part 7: Resistance to cracking on
18、 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: Resistance to accelerated ageing by the
19、 use of heat Part 14: Chalking (Helmen method) Part 15: Metamerism Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 13523-22:2010EN 13523-22:2010 (E) 4 Part 16: Resistance t
20、o abrasion Part 17: Adhesion of strippable films Part 18: Resistance to staining Part 19: Panel 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: Colour stability in humid atmos
21、pheres containing sulfur dioxide Part 24: Resistance to blocking and pressure marking Part 25: Resistance 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
22、 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,
23、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted wi
24、thout license from IHS-,-,-BS EN 13523-22:2010EN 13523-22:2010 (E) 5 1 Scope This European Standard specifies the procedure for determining the difference in the colour of an organic coating on a metallic substrate by visual comparison against a standard using either diffuse natural daylight or arti
25、ficial 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. This phenomenon is known as metamerism (see EN 13523-15). If metameric match is to be reported in o
26、bjective terms, spectrophotometric measurements (using CIE Standard Illuminants D65 and A) should be made, in accordance with EN 13523-15. No statement is made about either the precision or the accuracy of this procedure since the results derived are neither in numerical form nor do they provide a p
27、ass/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 metallic colours, etc.). Although colour measuring instruments should be used where possible, in some
28、cases a visual comparison can be useful (evaluation of colour matches, inspection of metallic 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
29、 for critical colour matching and is highly recommended for colour inspections. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the re
30、ferenced document (including any amendments) applies. EN 13523-0:2001, Coil coated metals Test methods Part 0: General introduction and list of test methods EN ISO 3668, Paints and varnishes Visual comparison of the colour of paints (ISO 3668:1998) 3 Terms and definitions For the purposes of this do
31、cument, the definitions given in EN 13523-0:2001 and the following apply. 3.1 colour sensation resulting from the visual perception of radiation of a given spectral composition NOTE The use of the German term “Farbe“ in the sense of coating material is deprecated. EN ISO 4618:2006, 2.57 3.2 metameri
32、sm 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 Copyright European Committee for Standardization Provided by IHS under license with CENNot fo
33、r ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 13523-22:2010EN 13523-22:2010 (E) 6 4 Principle The colour of the specimen under test is visually compared with a standard prepared under similar conditions. The comparison is carried out using either diffuse natural
34、daylight or artificial daylight, in a standard booth. 5 Illumination for colour matching 5.1 Natural daylight Light from a moderately overcast northern sky (for countries on the northern hemisphere). Reflection from strongly coloured neighbouring objects as well as direct sunlight should be excluded
35、. 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 shielded from external light, preferably by a permanent structure (lighting cabinet). The spectral characteristics of the light source should be equ
36、ivalent to those of the CIE Standard Illuminant D65. NOTE DIN 6173-2, BS 950-1 and BS 950-2 provide procedures for measuring the actual spectral energy distribution over the viewed area. The photometric conditions require an illumination between 1 000 lx (for very light colours) and 4 000 lx (for ve
37、ry 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 this European Standard. 5.3 Colour-matching booth See also EN ISO 3668. The colour-matching booth shall be an enclosure from which external lig
38、ht 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 Standard 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 tha
39、n 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 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
40、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 black with a lightness L* of about 25 (Munsell matt black, NCS S 9000-N). NOTE L*, a* and b* refer to the CIELAB system (ISO 7724-1). To secure
41、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 of the
42、 lamp from the test specimen. The spectral distribution properties of the lighting device shall include the spectral transmission of the screen. 6 Observer In order to obtain the best possible results, the following is recommended: Copyright European Committee for Standardization Provided by IHS und
43、er license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 13523-22:2010EN 13523-22:2010 (E) 7 a) It should be 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
44、 colour. c) Some rest periods should be allowed between the evaluation of widely differing matches as well as between long sessions. 7 Sampling See 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 imperfecti
45、ons 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 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
46、be evaluated. NOTE Since application, curing and film thickness contribute to the resulting colour, test specimens should be pre-treated and coated (including application of a priming coat, if required) as specified. The dry film thickness should be determined in accordance with EN 13523-1. 9 Proced
47、ure 9.1 General Evaluate the colour difference at ambient temperature. For more accurate comparisons, as required for instance in case of dispute, the temperature shall be (23 2) C and the relative humidity (50 5) %, in accordance with EN 23270. 9.2 Day-to-day routine Evaluate each pair of test spec
48、imens under natural or artificial daylight. Place the 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 of the comparison, interchange the position of
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