EN ISO 8654-2018 en Jewellery - Colours of gold alloys - Definition range of colours and designation.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Jewellery Colours of gold alloys Definition, range of colours and designation (ISO 8654:2018)BS EN ISO 8654:2018National forewordThis British Standard is the UK implementation of EN ISO 8654:2018. It is identical to ISO

2、 8654:2018. It supersedes BS EN 28654:1993, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/53, Specifications and test methods for jewellery and horology.A list of organizations represented on this committee can be obtained on request to its secre

3、tary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 97082 5ICS 39.060Compliance with a British Standard cannot con

4、fer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 8654:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NO

5、RMEN ISO 8654March 2018ICS 39.060 Supersedes EN 28654:1992EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 8654:2018: EAll rights of exploitation in any form and

6、 by any means reserved worldwide for CEN national MembersJewellery - Colours of gold alloys - Definition, range of colours and designation (ISO 8654:2018)Joaillerie, bijouterie - Couleurs des alliages dor - Dfinition, gamme de couleurs et dsignation (ISO 8654:2018)Schmuck - Farben von Goldlegierunge

7、n - Bezeichnung, Farbenreihe und Kennzeichnung (ISO 8654:2018)This European Standard was approved by CEN on 10 March 2018.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 witho

8、ut 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 la

9、nguage 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, Denma

10、rk, 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 and United Kingdom.English Vers

11、ionEN ISO 8654:2018 (E)European forewordThis document (EN ISO 8654:2018) has been prepared by Technical Committee ISO/TC 174 “Jewellery and precious metals”.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the l

12、atest by September 2018, and conflicting national standards shall be withdrawn at the latest by September 2018.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 paten

13、t rights.This document supersedes EN 28654:1992.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, Fo

14、rmer 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 and the United Kingdom.Endorsement noticeThe text of IS

15、O 8654:2018 has been approved by CEN as EN ISO 8654:2018 without any modification.2BS EN ISO 8654:2018ISO 8654:2018Foreword ivIntroduction v1 Scope .12 Normative references 13 Terms and definitions .14 Designation 15 Colour measurement .25.1 General . 25.2 Quantitative method 25.2.1 Preparation of t

16、he samples . 25.2.2 Measurement apparatus . 25.2.3 Measurement method . 35.3 Qualitative method 36 Gold alloy colours 3Annex A (informative) Recommended chemical composition of colour slips .8Bibliography 9 ISO 2018 All rights reserved iiiContents PageBS EN ISO 8654:2018ISO 8654:2018ForewordISO (the

17、 International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committe

18、e has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechni

19、cal standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in

20、 accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. D

21、etails of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an

22、 endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the foll

23、owing URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 174, Jewellery.This second edition cancels and replaces the first edition (ISO 8654:1987) which has been technically revised with the following changes: add a new colour definition: dark red (6N); descr

24、ibe a detailed metallographic preparation for the colour measurement; add tables for nominal values and tolerances for L*a*b* and L*C*h; add figures representing de tolerances in different colour spaces; the document was editorially revised.iv ISO 2018 All rights reservedBS EN ISO 8654:2018ISO 8654:

25、2018IntroductionIn the manufacture and sale of articles made of or coated with gold alloys, the colour of the surface of the product is an important characteristic.This document will enable the purchaser to define his requirements with precision by referring to the designations given within this doc

26、ument and so avoids the need for purchasing orders to be accompanied by colour samples. ISO 2018 All rights reserved vBS EN ISO 8654:2018This page deliberately left blankJewellery Colours of gold alloys Definition, range of colours and designation (ISO 8654:2018)1 ScopeThis document specifies a limi

27、ted number of colours of gold alloy and the method to measure colours.It applies to objects made of gold alloys or coated by gold alloys.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document

28、. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological dat

29、abases for use in standardization at the following addresses: ISO Online browsing platform: available at https:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/3.1colourthree-dimensional space represented by the chromaticity coordinates x and y and YNote 1 to entry: As defi

30、ned in CIE Publication No. 15, the values of Y correspond to the percentage values of the luminous reflectance factor.Note 2 to entry: When necessary for special purposes or in the field of national standardization, the chromaticity coordinates may be converted according to CIE Publication No. 15 to

31、 other nationally or internationally agreed systems (e.g. CIE 1976 L*a*b* colour space or CIE 1976 L*u*v* colour space).4 DesignationSeven designations of colours according to chromaticity coordinates are defined in Table 1.Table 1 Designation of coloursColour Designation0N yellow green1N pale yello

32、w2N light yellow3N yellow4N pink5N red6N dark redINTERNATIONAL STANDARD ISO 8654:2018 ISO 2018 All rights reserved 1BS EN ISO 8654:2018ISO 8654:20185 Colour measurement5.1 GeneralTwo methods are available to determine the colour, a quantitative method (see 5.2) and a qualitative method by visual com

33、parison (see 5.3).5.2 Quantitative method5.2.1 Preparation of the samples5.2.1.1 GeneralThe samples to be measured shall have a flat and polished surface to be used as a measurement area.The measurement area shall be exempt of defect.The finishing (polishing and washing) shall be (re)done until a mi

34、rror surface is achieved (Y reaches a constant value).After polishing, the sample colour measurement shall be made within 120 min maximum.NOTE Polishing, washing and environment conditions can greatly affect the colour.5.2.1.2 Metallographic preparationMetallographic preparation is made with a final

35、 polishing with broadcloth charged with an abrasive solution. The solution contains 1 m sized abrasive particles.5.2.1.3 Sample cleaningThe recommended sample cleaning is done by gently wiping the surface with a clean soft cloth (microfibre) and some isopropylalcohol (IPA).5.2.2 Measurement apparatu

36、s5.2.2.1 GeneralThe measurement apparatus for the colour measurement of a gold alloy shall be in accordance to CIE Publication No. 15.5.2.2.2 Reference apparatusThe reference apparatus for the colour measurement of a gold alloy is an integrating sphere spectrophotometer able to measure spectral refl

37、ectance, with a measurement geometry compatible with designation di:8 or 8:di (specular component included).NOTE Other measurement geometries can be used as long as they do not affect significantly the colour results compared to the described measurement geometry.5.2.2.3 Spectrophotometer setupBefor

38、e making any measurement, the apparatus shall be set up with the following parameters: Specular Component Included (SCI); Standard illuminant D65;2 ISO 2018 All rights reservedBS EN ISO 8654:2018ISO 8654:2018 Standard observer 2.5.2.3 Measurement methodMeasure the spectral reflectance.The measured v

39、alues in the xyY colour space shall be expressed with 4 significant digits for x and y and 1 significant digit for Y.The measured or converted values in the L*a*b* colour space shall be indicated with 2 significant digits for a* and b* or C* and h and 1 significant digit for L*.The colour measure is

40、 an average of 5 distinct measurements of the sample (after repositioning) ensuring to revolve it between each measurement.5.3 Qualitative methodFor (visual) comparison purposes of the sample, it is possible to use a range of polished colour slips.A preparation of colour slips is described in Annex

41、A.6 Gold alloy coloursNominal values and tolerances of colours are given in Table 2, 3 and 4 in accordance with 5.2.Figures 1, 2, 3, 4 illustrate graphically nominal and tolerances values.NOTE The eye of a trained person can see colour differences even within a tolerance range.Table 2 Nominal values

42、 and tolerances for xyYColourChromaticity coordinatesNominal values Tolerancesx y Y x y Y (max/min)0N 0,346 3 0,371 4 84,90,351 3 0,373 688,60,344 8 0,366 00,341 5 0,368 981,20,347 4 0,377 01N 0,353 2 0,370 8 81,50,357 4 0,372 585,20,351 3 0,366 60,349 1 0,369 077, 80,354 8 0,375 22N 0,361 0 0,376 9

43、 78,80,365 0 0,378 282,50,359 3 0,372 90,357 1 0,375 475,00,362 4 0,381 03N 0,361 6 0,371 4 76,20,366 2 0,373 079,90,359 1 0,367 20,357 1 0,369 772,40,363 9 0,375 9 ISO 2018 All rights reserved 3BS EN ISO 8654:2018ISO 8654:2018ColourChromaticity coordinatesNominal values Tolerancesx y Y x y Y (max/m

44、in)4N 0,361 4 0,365 2 74,00,365 7 0,366 377,70,358 8 0,361 40,357 2 0,363 970,20,363 8 0,369 25N 0,360 3 0,358 7 71,40,364 3 0,359 375,10,357 7 0,355 40,356 3 0,357 967,70,362 7 0,362 16N 0,357 9 0,351 8 68,60,361 9 0,352 272,30,355 0 0,348 90,353 9 0,351 264,90,360 7 0,354 9Table 3 Nominal values a

45、nd tolerances for L*a*b*ColourChromaticity coordinatesNominal values TolerancesL* a* b* L* (max/min) a* b*0N 93,8 3,01 21,3895,41,68 23,151,39 19,1992,24,13 19,564,85 23,551N 92,4 0,35 22,2494,01,48 23,671,28 20,4190,70,71 20,810,78 24,092N 91,1 1,20 25,6492,82,37 26,902,12 23,9389,40,14 24,340,13 2

46、7, 333N 90,0 3,69 23,6191,64,97 25,074,37 21,6888,22,47 22,142,81 25,604N 88,9 6,13 21,2390,67,48 22,456,63 19,4487,14,89 19,985,48 23,065N 87,7 8,32 18,5889,49,74 19,558,62 16,9785,96,96 17, 557, 89 20,19NOTE Tolerances on a* and b* are converted from xyY using the nominal value of Y.4 ISO 2018 All

47、 rights reservedBS EN ISO 8654:2018ISO 8654:2018ColourChromaticity coordinatesNominal values TolerancesL* a* b* L* (max/min) a* b*6N 86,3 10,12 15,5788,111,62 16,4510,14 14,0684,48,69 14,639,97 17,13NOTE Tolerances on a* and b* are converted from xyY using the nominal value of Y.Table 4 Nominal valu

48、es and tolerances for L*C*hColourChromaticity coordinatesNominal values TolerancesL* C* h (deg) L* (max/min) C* h (deg)0N 93,8 21,59 98,0095,423,21 94,1519,24 94,1392,219,99 101,9324,04 101,641N 92,4 22,25 89,1094,023,72 86,4220,45 86,4090,720,82 91,9524,10 91,862N 91,1 25,67 87, 3392,827,01 84,9724

49、,02 84,9489,424,35 89,6827, 33 89,733N 90,0 23,89 81,1291,625,56 78,7922,11 78,6088,222,28 83,6325,75 83,734N 88,9 22,10 73,8990,623,67 71,5720,54 71,1787,120,57 76,2423,71 76,635N 87,7 20,36 65,8889,421,84 63,5119,03 63,0685,918,88 68,3621,68 68,646N 86,3 18,57 56,9888,120,14 54,7517, 33 54,2084,417,02 59,3019,82 59,80NOTE Tolerances on C* and h are converted from xyY using the nominal value of Y. ISO 2018 All rights reserved 5BS EN ISO 8654:2018ISO 8654:2018Figure 1 xy tolerances according to Table 2Figure 2