Designation:E1347−06(Reapproved2015)StandardTestMethodforColorandColor-DifferenceMeasurementbyTristimulusColorimetry1ThisstandardisissuedunderthefixeddesignationE1347;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheinstrumentalmeasurementofspecimensresultingincolorcoordinatesandcolordifferencevaluesbyusingatristimuluscolorimeter,alsoknownasatristimulusfiltercolorimeteroracolor-differencemeter.1.2Provisionismadeinthistestmethodforthemeasure-mentofcolorcoordinatesandcolordifferencesbyreflectedortransmittedlightusingeitherahemisphericalopticalmeasur-ingsystem,suchasanintegratingsphere,orabidirectionalopticalmeasuringsystem,suchasannular,circumferential,oruniplanar45:0and0:45geometry.1.3Becauseofthelimitedabsoluteaccuracyoftristimuluscolorimeters,thistestmethodspecifiesthat,whencolorcoor-dinatesarerequired,theinstrumentbestandardizedbyuseofastandardhavingsimilarspectral(color)andgeometriccharacteristicstothoseofthespecimen.Thisstandardisalsoknownasaproductstandard.Theuseofaproductstandardofsuitablestabilityishighlydesirable.1.4Becausetristimuluscolorimetersdonotprovideanyinformationaboutthereflectanceortransmittancecurvesofthespecimens,theycannotbeusedtogainanyinformationaboutmetamerismorparamerism.1.5Becauseoftheinabilityoftristimulus(filter)colorim-eterstodetectmetamerismorparamerismofspecimens,thistestmethodspecifiesthat,whencolordifferencesarerequired,thetwospecimensmusthavesimilarspectral(color)andgeometriccharacteristics.Inthiscase,theinstrumentmaybestandardizedforreflectancemeasurementbyuseofawhitereflectancestandardor,fortransmittancemeasurement,withnospecimenorstandardatthespecimenposition.1.6Thistestmethodisgenerallysuitableforanynon-fluorescent,planar,object-colorspecimensofallglosslevels.Usersmustdeterminewhetheranin...
