1、Designation:E219414Standard Test Method forMultiangle Color Measurement of Metal Flake PigmentedMaterials1This standard is issued under the fixed designation E2194;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONSurfaces that exhibit different colors depending on the angles of illumination or sensing are said tobe“gonioapparent.”Colorimetric
3、 values of reflecting gonioapparent materials are derived fromspectrometric(narrow band)or colorimetric(broad band)measurements of reflectance factor,atvarious aspecular angles.When using spectral values,tristimulus values are computed using the CIEStandard Observer and the spectrum of the illuminan
4、t,as described in Practice E308.This test method,E2194,specifies the measurement of color observed at various aspecular angles.1.Scope1.1 This test method covers the instrumental requirements,standardization procedures,material standards,and parametersneeded to make precise instrumental measurements
5、 of thecolors of gonioapparent materials.This test method is designedto encompass gonioapparent materials;such as,automotivecoatings,paints,plastics,and inks.1.2 This test method addresses measurement of materialscontaining metal flake and pigments.The measurement ofmaterials containing metal flakes
6、 requires three angles ofmeasurement to characterize the colors of the specimen.Theoptical characteristics of materials containing pearlescent andinterference materials are not covered by this test method.NOTE1Data taken by utilizing this test method are for gonio-appearance quality control purposes
7、.This procedure may not necessarilysupply appropriate data for spatial-appearance or pigment identification.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,
8、if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E284 Terminology of AppearanceE308 Practice for
9、Computing the Colors of Objects by Usingthe CIE SystemE805 Practice for Identification of Instrumental Methods ofColor or Color-Difference Measurement of MaterialsE1345 Practice for Reducing the Effect of Variability ofColor Measurement by Use of Multiple MeasurementsE1708 Practice for Electronic In
10、terchange of Color andAppearance DataE2539 Test Method for Multiangle Color Measurement ofInterference Pigments2.2 CIE Document:3Publication No.15:2004 Colorimetry2.3 NIST(NBS)Publication:4LC-1017 Standards for Checking the Calibration of Spectro-photometers2.4 ISO Publication:5ISO International Voc
11、abulary of Basic and General Terms inMetrology(VIM)1This test method is under the jurisdiction of ASTM Committee E12 on Colorand Appearance and is the direct responsibility of Subcommittee E12.12 onGonioapparent Color.Current edition approved Nov.1,2014.Published November 2014.Originallyapproved in
12、2003.Last previous edition approved in 2012 as E2194 12.DOI:10.1520/E2194-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe AS
13、TM website.3Available from U.S.National Committee of the CIE(International Commissionon Illumination),http:/www.cie-usnc.org or http:/ from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.5ISO/IDE/OIML/BIPM,International Voca
14、bulary of Basic and General Terms inMetrology,International Organization for Standardization,Geneva Switzerland,1984.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 Terms and definitions in Terminology E284 are appli-cabl
15、e to this test method.See Section“Specialized Terminol-ogy on Gonioapparent Phenomena.”3.2 Definitions:3.2.1 Usually the term metallic refers to a metal material.However,this standard employs the alternative definition givenin Terminology E284 as:3.2.2 metallic,adjpertaining to the appearance of a g
16、onio-apparent material containing metal flakes.3.3 Definitions of metrology terms in ISO InternationalVocabulary of Basic and General Terms in Metrology(VIM)are applicable to this test method.4.Summary of Test Method4.1 This test method describes the procedures for thespectrometric and colorimetric measurement of metal flakepigmented materials.The results are reported in terms of CIEtristimulus values and other color coordinate systems.Stan-dardization of the instrument used to measure these mat
