1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Anodizing of aluminium and its alloys - Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20 degrees, 45 degrees, 60 degrees or 85 degrees (ISO 7668:2018) BS EN ISO 7668:20
2、18National forewordThis British Standard is the UK implementation of EN ISO 7668:2018. It is identical to ISO 7668:2018. It supersedes BS EN ISO 7668:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A
3、list of organizations represented on this committee can be obtained on request to its secretary.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 Standard
4、s Limited 2018ISBN 978 0 580 97200 3ICS 25.220.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publicationDate
5、 Text affectedBRITISH STANDARDBS EN ISO 7668:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 7668March 2018ICS 25.220.20 Supersedes EN ISO 7668:2010EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix
6、 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 7668:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersAnodizing of aluminium and its alloys - Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20 deg
7、rees, 45 degrees, 60 degrees or 85 degrees (ISO 7668:2018)Anodisation de laluminium et de ses alliages - Mesurage des caractristiques de rflectivit et de brillant spculaires des couches anodiques angle fixe de 20 degrs, 45 degrs, 60 degrs ou 85 degrs (ISO 7668:2018)Anodisieren von Aluminium und Alum
8、iniumlegierungen - Messung des gerichteten Reflexionsgrades und des Spiegelglanzes von anodisch erzeugten Oxidschichten bei Winkeln von 20, 45, 60 oder 85 (ISO 7668:2018)This European Standard was approved by CEN on 14 March 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulati
9、ons 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.T
10、his 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 mem
11、bers are the national standards 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, Portu
12、gal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 7668:2018 (E)European forewordThis document (EN ISO 7668:2018) has been prepared by Technical Committee ISO/TC 79 “Light metals and their alloys“ in collaboration with Technical Comm
13、ittee CEN/TC 132 “Aluminium and aluminium alloys”, the secretariat of which is held by AFNOR.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 September 2018, and conflicting national standards shal
14、l 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 patent rights.This document supersedes EN ISO 7668:2010.According to
15、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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
16、 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 ISO 7668:2018 has been approved by CEN as EN ISO 7668:2018 with
17、out any modification.2BS EN ISO 7668:2018ISO 7668:2018Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Apparatus and geometric conditions 25.7 Geometric conditions 26 Optical standards . 66.1 Reference standards . 66.1.1 Black glass . 66.1.2 Glass
18、 prism (for Method E only). 66.2 Working standards 76.2.1 Description 76.2.2 Zero point check . 77 Preparation and calibration of apparatus . 78 Measurement of specular reflectance and specular gloss 88.1 General . 88.2 Measurement of specular reflectance . 88.3 Measurement of specular gloss 89 Expr
19、ession of results .119.1 General 119.2 Specular reflectance 119.3 Specular gloss . 1110 Test report 11Annex A (normative) Specular reflectance and specular gloss of black glass 12 ISO 2018 All rights reserved iiiContents PageBS EN ISO 7668:2018ISO 7668:2018ForewordISO (the International Organization
20、 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 committee has been established has
21、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 electrotechnical standardization.The pro
22、cedures 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 accordance with the editor
23、ial 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. Details of any patent rights
24、 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 endorsement.For an explana
25、tion 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 following URL: www.iso.org/iso/
26、foreword.html.This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 2, Organic and anodic oxidation coatings on aluminium.This third edition cancels and replaces the second edition (ISO 7668:2010), which has been technically revised. The main tec
27、hnical changes are as follows: the normative references have been added; the definition of specular gloss has been revised; the references to CIE spectral luminous efficiency and CIE standard illuminants C and D65 have been added.iv ISO 2018 All rights reservedBS EN ISO 7668:2018ISO 7668:2018Introdu
28、ctionSpecular reflectance and specular gloss are not unique physical properties of a surface. They vary with the angle of measurement, and with the aperture dimensions that define the incident and the reflected beams, such that measurements of these properties are not independent of the apparatus be
29、ing used.The specular reflectance of most surfaces increases with the angle of measurement and accounts for the use of reflectometers with various angles as, for example, for painted surfaces. The specular reflectance characteristics of anodized aluminium, however, do not always behave in the normal
30、 manner and, because of its property of double reflection, reflected light comes partly from the film surface and partly from the underlying metal. It is advisable to measure the specular reflectance characteristics at 20, 45, 60 and 85 to obtain a complete understanding of the specular reflectance
31、properties of the anodized surface, and careful thought should be given to which method or methods are most relevant in any particular situation. The specular reflectance of bright-anodized aluminium with a mirror finish is best measured using 45 or 20 geometry. ISO 2018 All rights reserved vBS EN I
32、SO 7668:2018This page deliberately left blankAnodizing of aluminium and its alloys - Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20 degrees, 45 degrees, 60 degrees or 85 degrees (ISO 7668:2018) 1 ScopeThis document specifies methods for the measur
33、ement of specular reflectance and specular gloss of flat samples of anodized aluminium using geometries of 20 (Method A), 45 (Method B), 60 (Method C) and 85 (Method D); and of specular reflectance by an additional 45 method (Method E) employing a narrow acceptance angle.The methods described are in
34、tended mainly for use with clear anodized surfaces. They can be used with colour-anodized aluminium, but only with similar colours.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. For
35、dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7583, Anodizing of aluminium and its alloys Terms and definitionsISO 11664-1, Colorimetry Part 1: CIE standard colorimetric observersISO 1166
36、4-2, Colorimetry Part 2: CIE standard illuminantsCIE Publication No. 15, Colorimetry3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 7583 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following
37、addresses: ISO Online browsing platform: available at https:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/3.1specular reflectanceratio of the luminous flux, reflected in the specular direction for a specified source and receptor angle, to the luminous flux of the inciden
38、t lightNote 1 to entry: Normally expressed as a percentage.INTERNATIONAL STANDARD ISO 7668:2018 ISO 2018 All rights reserved 1BS EN ISO 7668:2018ISO 7668:20183.2specular glossratio of the luminous flux, reflected from an object in the specular direction for a specified source and receptor angle, to
39、the luminous flux reflected from glass with a refractive index of 1,567 at a wavelength of 546,1 nm (which is the central wavelength of the spectral luminous efficiency function) in the specular directionNote 1 to entry: To set the specular gloss scale, polished black glass with a refractive index o
40、f 1,567 is assigned the value of 100 for geometries of 20, 45, 60 and 85 (see Table 5). The phenomenon of light reflectance by anodized aluminium is very different to that of black glass and the choice of a black-glass standard is arbitrary and made to allow comparison of different qualities of anod
41、ized aluminium.4 PrincipleThe specular reflectance and specular gloss of anodized aluminium surfaces are measured under defined conditions using, as required, geometries of 20, 45, 60 and 85.5 Apparatus and geometric conditionsUsual laboratory apparatus and in particular the following.5.1 General. A
42、pproximate comparisons between surfaces of the same colour can be made, but an accurate measurement requires the combination of light source, photoelectric cell and associated colour filters to give a spectral sensitivity, approximating to the CIE spectral luminous efficiency, V(), weighted for CIE
43、standard illuminants C or D65. V() shall conform to the requirements of ISO 11664-1. CIE standard illuminants C and D65 shall conform to the requirements of CIE 15 and ISO 11664-2.NOTE Since specular reflection is in general spectrally non-selective, the spectral characteristics of the light source
44、(5.2) and the receptor (5.4) do not affect the measurement of normal uncoloured anodized surfaces.5.2 Polychromatic light source and housing, with a lens that directs a parallel, or very slightly converging, beam of light onto the surface under test.5.3 Means for locating the specimen surface, in th
45、e correct position for measurement.5.4 Receptor housing containing a lens, a receptor aperture and a photoelectric cell, to receive the cone of reflected light.5.5 Sensitivity control, for setting the photocell current to any desired value on the instrument scale or digital indicator.5.6 Receptor me
46、ter, capable of giving an indication proportional to the light flux passing the receptor aperture within 1 % of the full-scale reading. Spectral corrections are not usually required (see Note to 5.1).5.7 Geometric conditionsThe incident angle, 1, which is the angle between the axis of the incident b
47、eam and the perpendicular to the surface under test, shall have the following values and tolerances: for Method A: 20 0,1; for Method B: 45 0,1; for Method C: 60 0,1; for Method D: 85 0,1;2 ISO 2018 All rights reservedBS EN ISO 7668:2018ISO 7668:2018 for Method E: 45 0,1.There shall be no vignetting
48、 of rays that lie within the angles specified above.The axis of the receptor shall, as far as possible, coincide with the mirror image of the axis of the incident beam; the receptor angle, 2, which is the angle between the axis of the receptor and the perpendicular to the surface under test, shall b
49、e for all methods such that|1 2| 0,1With a flat piece of polished glass or other front-surface mirror in the test specimen position, an image of the source shall be formed at the centre of the receptor aperture. The width of the illustrated area of the test specimen shall be not less than 10 mm.The angular dimensions of the receptor apertures shall be measured from the receptor lenses. The dimensions and tolerances of the sources and receptors shall be as indicated in Tables 1 and 2. F
