Designation:E1164−12(Reapproved2017)´1StandardPracticeforObtainingSpectrometricDataforObject-ColorEvaluation1ThisstandardisissuedunderthefixeddesignationE1164;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditorialcorrectionsweremadethroughoutinMay2017.INTRODUCTIONThefundamentalprocedureforevaluatingthecolorofareflectingortransmittingobjectistoobtainspectrometricdataforspecifiedilluminatingandviewingconditions,andfromthesedatatocomputetristimulusvaluesbasedonaCIE(InternationalCommissiononIllumination)standardobserverandaCIEstandardilluminant.Theconsiderationsinvolvedandtheproceduresusedtoobtainprecisespectrometricdataarecontainedinthispractice.ThevaluesandproceduresforcomputingCIEtristimulusvaluesfromspectrometricdataarecontainedinPracticeE308.ConsiderationsregardingtheselectionofappropriateilluminatingandviewinggeometriesarecontainedinGuideE179.1.Scope1.1Thispracticecoverstheinstrumentalmeasurementrequirements,calibrationprocedures,andmaterialstandardsneededtoobtainprecisespectraldataforcomputingthecolorsofobjects.1.2Thispracticeliststheparametersthatmustbespecifiedwhenspectrometricmeasurementsarerequiredinspecificmethods,practices,orspecifications.1.3Mostsectionsofthispracticeapplytobothspectrometers,whichcanproducespectraldataasoutput,andspectrocolorimeters,whicharesimilarinprinciplebutcanproduceonlycolorimetricdataasoutput.Exceptionstothisapplicabilityarenoted.1.4Thispracticeislimitedinscopetospectrometersandspectrometriccolorimetersthatemployonlyasinglemono-chromator.Thispracticeisgeneralastothematerialstobecharacterizedforcolor.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheus...
