ASTM_D_5382_-_02_2017.pdf

Designation:D538202(Reapproved 2017)Standard Guide toEvaluation of Optical Properties of Powder Coatings1This standard is issued under the fixed designation D5382;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe term optical properties of powder coatings refers to those properties associated with theinteraction of visible light with the coatings.These properties include,but are not limited to,color,color difference,gloss,and metamerism.Coating powder users and producers may sometimes beoverwhelmed by the sheer number of standard practices and standard test methods available for theevaluation of the optical properties of the finished coatings.This guide is intended to lead the user to each of the practices and test methods needed,once theuser decides whether the evaluation is to be by visible means or by instrumental means.Further,theuser must decide which of the several optical properties mentioned above are to be evaluated.Thisguide will lead the user to the applicable practices and test methods for the properties chosen by themeans selected.1.Scope1.1 This standard provides the user with a guide to thevarious available practices and test methods for the evaluationof color,color difference,gloss,and metamerism by bothvisual and by instrumental means.1.2 This standard does not purport to address all of thesafety concerns,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.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D523 Test Method for Specular GlossD1535 Practice for Specifying Color by the Munsell SystemD1729 Practice for Visual Appraisal of Colors and ColorDifferences of Diffusely-Illuminated Opaque MaterialsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD2616 Test Method for Evaluation of Visual Color Differ-ence With a Gray ScaleD3134 Practice for Establishing Color and Gloss TolerancesD4039 Test Method for Reflection Haze of High-GlossSurfacesD4086 Practice for Visual Evaluation of MetamerismD4449 Test Method for Visual Evaluation of Gloss Differ-ences Between Surfaces of Similar AppearanceD5767 Test Methods for Instrumental Measurement ofDistinctness-of-Image Gloss of Coating SurfacesE284 Terminology of AppearanceE308 Practice for Computing the Colors of Objects by Usingthe CIE SystemE430 Test Methods for Measurement of Gloss of High-GlossSurfaces by Abridged GoniophotometryE1247 Practice for Detecting Fluorescence in Object-ColorSpecimens by SpectrophotometryE1331 Test Method for Reflectance Factor and Color bySpectrophotometry Using Hemispherical GeometryE1345 Practice for Reducing the Effect of Variability ofColor Measurement by Use of Multiple MeasurementsE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus ColorimetryE1349 Test Method for Reflectance Factor and Color bySpectrophotometry Using Bidirectional(45:0 or 0:45)Geometry1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.51 on Powder Coatings.Current edition approved June 1,2017.Published June 2017.Originallyapproved in 1993.Last previous edition approved in 2013 as D5382 02(2013).DOI:10.1520/D5382-02R17.2For 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 ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 E1360 Practice for Specifying Color by Using the OpticalSociety of America Uniform Color Scales SystemE1541 Practice for Specifying and Matching Color Usingthe Colorcurve System(Withdrawn 2007)33.Terminology3.1 The definitions in Terminology E284 are applicable tothe appearance terms used in this standard.The followingterms from Terminology E284 are specific to this