奥迪颜色控制

BASFBASFCoatingsAGFarbmetriklabor8/16/201911.Basicsofcolorimetry2.Auditolerancing3.Productioncontrol4.Colorcareconcept1.Basicsofcolorimetry(色度学基础)2.Auditolerancing（奥迪允许值）3.Productioncontrol（生产控制）4.Colorcareconcept(颜色管理概念)BASFBASFCoatingsAGFarbmetriklabor8/16/20192BasicsofcolorimetryBASFBASFCoatingsAGFarbmetriklabor8/16/20193Whatiscolor?LightsourceSampleEyeBrainPhysicsHumansenseBASFBASFCoatingsAGFarbmetriklabor8/16/20194EventhehumaneyecommitsmistakesOpticalillusionsBASFBASFCoatingsAGFarbmetriklabor8/16/20195EventhehumaneyecommitsmistakesTheeyeenlargescolordifferences,evenwhentheyarenotexistingBASFBASFCoatingsAGFarbmetriklabor8/16/20196Whatislight?Electromagneticwavesintherangebetween400-700nm400nm700nmBASFBASFCoatingsAGFarbmetriklabor8/16/20197Whathappensinthepaint?Int.Int.DaylightArtificallightSampleBASFBASFCoatingsAGFarbmetriklabor8/16/20198Whathappemsinthehumaneye?Int.GreyreceiverColorreceiverXYZBASFBASFCoatingsAGFarbmetriklabor8/16/20199Whathappensinthehumanbrain?2°normalobserver193145cm45cm10°Normalobserver1964BASFBASFCoatingsAGFarbmetriklabor8/16/201910AdditivecolormixingRed+Green+Blue=WhiteSubtractivecolormixingRed+Green+Blue=BlackBASFBASFCoatingsAGFarbmetriklabor8/16/201911Howtomeasurecolor?PhysicalpartPhysiologicalpartSpectrophotometerTablesfornormalobserverandspectralfunctionsBASFBASFCoatingsAGFarbmetriklabor8/16/201912Whatistheprinicipleofacolorspectrophotometer?Int.Int.SampleBASFBASFCoatingsAGFarbmetriklabor8/16/201913TheprincipleofthetwowaysReferenceSampleRrefRProbeR=RProbeRrefIndependenceofthebulbVariationsofthebulbwillbecompensatedWemeasurerelativespectralreflectionBASFBASFCoatingsAGFarbmetriklabor8/16/201914WhyisthereaneedforcalibrationThecalibrationisneededtocreateauniformscaleforthereflection0CelsiusIcewater100CelsiusBoilingwater02040608010052CelsiusLinearscaleBlackcalibrationWhitecalibrationBASFBASFCoatingsAGFarbmetriklabor8/16/201915CIEColorvaluesXYZIllumination*Spectralreflection*Spectralfunctions=ColorvaluesInt.Int.XYZ===TablesstoredinthecomputerMeasuredbyspectrophotometerTablesstoredinthecomputerBASFBASFCoatingsAGFarbmetriklabor8/16/201916ColorvaluesXYZandxyBASFBASFCoatingsAGFarbmetriklabor8/16/201917CIEL*a*b*System+b*yellowL=100white*-b*blue+a*red-a*greenL=0black*L*=116*(Y/Yn)1/3a*=500*[(X/Xn)1/3–(Y/Yn)1/3]b*=200*[(X/Xn)1/3–(Z/Zn)1/3]XnYnZnColorvaluesforthereferencewhiteBASFBASFCoatingsAGFarbmetriklabor8/16/201918CIEL*C*H*redyellow+b*-b*+a*-a*greenblueBPDC*DH*DifferenceinlightnessDLLLPBDifferenceinchromaDCababPPBB2222DifferenceinhueDDDDHELCab222BASFBASFCoatingsAGFarbmetriklabor8/16/201919WhyL*C*H*insteadL*a*b*?redyellow+b*+a*ReferenceSamplebSamplebReferenceblue?aSampleaReferencegreenHsampleHReferenceyellow?Whichisthecorrectanswer?BASFBASFCoatingsAGFarbmetriklabor8/16/201920WhyL*C*H*insteadL*a*b*?redyellow+b*-b*+a*-a*greenblueSampleReferencebSamplebReferenceblueaSampleaReferencegreen?HSampleHReferencered?Whichisthecorrectanswer?BASFBASFCoatingsAGFarbmetriklabor8/16/201921CIEL*a*b*orCIEL*C*h*?NonbrilliantcolorsC10BrilliantcolorsC10redyellow+b*-b*+a*-a*greenblueBPDC*DH*JudgementaccordingDL*,Da*,Db*JudgementaccordingDL*,DC*,DH*BASFBASFCoatingsAGFarbmetriklabor8/16/201922Diiferencesolid,metallicandpearlescentcolors+b*yellow+LLightness*solidmetallicpearlescent-b*bluegreenredBASFBASFCoatingsAGFarbmetriklabor8/16/201923GeometriesSample0°Glossbulb15°25°45°75°110°BASFBASFCoatingsAGFarbmetriklabor8/16/201924GeometriesObservationangle+illuminationangle=geometrie45+-20=2525+0=2575+-50=25BASFBASFCoatingsAGFarbmetriklabor8/16/201925X-RitespectrophotometerMA583Geometries25,45,75MA604Geometries15,25,45,75MA685Geometries15,25,45,75,110BASFBASFCoatingsAGFarbmetriklabor8/16/201926ProblemsoftheCIEL*a*b*SystemNocorrelationvisualimpressionandmeasuredcolordifferencesacceptancevaluesdifferfromcolortocolorangulardependencyoftheacceptancevaluesToosimpleformetallicandpearlescantcolors!BASFBASFCoatingsAGFarbmetriklabor8/16/201927InterinstrumentagreementofdifferentX-RitespectrophotometersBASFBASFCoatingsAGFarbmetriklaborAuditolerancingBASFBASFCoatingsAGFarbmetriklabor8/16/201929IntroductionofweightingfactorsNonchromaticcolorsC10ChromaticC10DEDLScDaScDbScLab÷÷÷÷÷÷÷÷÷÷÷÷*-b*+a*-a*gr黱blauBPDC*DH*CBASFBASFCoatingsAGFarbmetriklabor8/16/201930DeterminationoftheweighingfactorsVisuallytestingthebatchpanelsofthelastyearsbydifferentpersonsandmeasuringthesepanelsVisuallytestingtheproductionofthemasterpanelsandmeasuringthesepanelsredyellowgreen(alwaysaccepted)(alwaysrejected)(sometimesaccepted/sometimesrejectedvisuallycolorimetricallyzoneBASFBASFCoatingsAGFarbmetriklabor8/16/201931TolerancefactorsRedScL45Sca45Scb45ScC45ScH450.41.40.4Green0.40.80.4Blue0.40.60.4Black0.30.30.3White0.30.30.3BASFBASFCoatingsAGFarbmetriklabor8/16/201932AuditolerancessolidcolorsAbsolutevaluesofthestandard45°GeometrieTolerances45°GeometrieL-NrL*a*b*C*h*ScLSca,ScbScC,ScHY9B0,900,30-0,300,42315,000,300,300,30Y5K3,001,60-8,