GroupstandardVW50190

Issue2017-11

Class.No.:50202

Descriptors:colorimetrics,vehicleinteriorequipment,interiorequipment,colorconsistency,colordifference,sample

standard,originalstandard,glosslevel,gloss,chromesurface,color,textile,plastic,metal,leather

VehicleInteriorEquipmentComponents

Measurement-BasedEvaluationofColorandGlossLevel

VisualEvaluationofChromeSurfaces

Previousissues

VW50190:2000-11,2006-10,2011-01

Changes

ThefollowingchangeshavebeenmadetoVW50190:2011-01:

–Standardedited

–Typographicalmistakesin

table3

corrected

–Technicalresponsibilityupdated

Page1of19

Alwaysusethelatestversionofthisstandard.

Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.

TheEnglishtranslationisbelievedtobeaccurate.Incaseofdiscrepancies,theGermanversionisaloneauthoritativeandcontrolling.

Technicalresponsibility

GQL-P/5

Dirk

Wegner

Tel.:

+495361991476

GQL-P/5

Thomas

Taddigs

Tel.:

+4953619969723

GQL-P

DenisEschwey

TheStandardsdepartment

K-ILI/5Ute

Hager-Sü?

K-ILI

Tel.:

+495361949035

UweWiesner

Allrightsreserved.NopartofthisdocumentmaybeprovidedtothirdpartiesorreproducedwithoutthepriorconsentofoneoftheVolkswagenGroup’sStandardsdepartments.

?VolkswagenAktiengesellschaftVWNORM-2016-12

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VW50190:2017-11

1Scope

Thisstandarddefinestherequirementsforcolordeviations,aswellasthemeasurementandeval‐uationconditionsfortheequipment-baseddeterminationofcolordifferences,forvehicleinterior

equipmentcomponents.Itappliestothesamplemonitoringandmonitoringofconformityofpro‐ductionforthefollowingmaterials:

–Solid-coloredandnon-luminescenttextiles

–Insensitivetostroking,withoutstructure

–Insensitivetostroking,withstructure

–Sensitivetostroking,withoutstructure

–Plasticparts

–Withgrainedsurfaces(leathergrain,finestructure,etc.)

–Withpaintedsurfaces(soft-touchpaint,decorativepaint,etc.)

–Slushpart,foamfilm,PUhardfoam(dashboardarea,sunvisor)

–Paintedmetalparts(exception:partspaintedinbodycolor)

–Leather(genuineleatherandleatherette)

2Definitions

2.1Designreleasesample

ColorconceptreleasedbyDesign.Thedesignreleasesampleisacolorimetricreferenceandpro‐videsthebasisfortheoriginalstandardandforthesamplestandards.

2.2Samplestandard

2.2.1SamplestandardfortheVolkswagenbrand

Reproductionofthedesignreleasesamplewithregardtocolor,gloss,feel,texture,andgrainintheformofsamplesheets,finishedpartsections,orentirefinishedparts.

Samplestandardsareusedforvisualsampleinspectionpurposes.

2.2.2SamplestandardfortheAudibrand

Thepaintedsamplestandardservesasreferenceforthevisualandcolorimetricevaluationofallsurfaces.ThispaintedsamplestandardforcolorconsistsofapaintedISOA5plasticpanel.It

servesasvisualandcolorimetricreference.However,thevisualimpressiontakesprecedence.

Samplestandardsformaterials,e.g.,leather,areusedonlyasareferenceforstructureandtactileproperties.

2.3Originalcolortone

Computedmeanvalueoftheabsolutecolorcoordinatesofall(maximum300)samplestandards.

2.4Originalstandard

Theoriginalstandardisthesamplestandardthatisclosesttothecomputedoriginalcolortone.Itservesastheexclusivecolorimetricreference.

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VW50190:2017-11

2.5Finishedpartsample

Complexpartwhichmayconsistofdifferentmaterialswithdifferentsurfaces(e.g.,steeringwheel,overheadconsole,doortrimpanel)

2.6Solidcolors

Solid-colorsurfacesaresurfaceswhoseoverallvisualimpressionisofasinglecolor.

2.7Insensitivetostroking

Textilesareinsensitivetostrokingiftheydonothaveanyvisuallyperceptiblecontrastdifferenceswhenstrokedbyhand.

2.8Sensitivetostroking

Textilesaresensitivetostrokingiftheyhavevisuallyperceptiblecontrastdifferenceswhenstrokedbyhand(e.g.,velour,tufting,Alcantara?).

2.9Structures

Structuresareembossmentsandconsistentseamcontoursthatcreatedifferentpileheightsinpla‐ces,thusproducingvisuallydiscerniblecontrastdifferences.

2.10Glosslevel

Glosslevel,alsoreferredtoassurfacegloss,describesthereflectionpropertiesofsurfacesandmaterials.Theglosslevelisindicatedinglossunits(GU).

3Designation

ColorconsistencyasperVolkswagenstandardVW50190

4Requirements

4.1Basicrequirements

Asanitycheckofthelimitsdeterminedbymeasurementforvisualacceptance,whichisdefinedbyVolkswagenAGduringadvanceengineering,isusedasthebasisforthemeasurementtolerances.Duetofactorsinfluencingtheequipmentandtechniques,revisionsmaybemadeintheproductionphase.

Thesupplierisrequiredtomonitortheprocessusingstatisticalprocesscontrol.

Componentsmustbemeasuredbythesupplierwithoutexception,anddeliveredwiththecorre‐spondingreport.Inaddition,themeasuredvaluesmustbesanity-checkedintermsofthevisualimpression(evenwhenthemeasurement-basedevaluationyieldsanOKresult).

Withoutexception,allmeasurement-basedandvisualevaluationsareconductedunderboththe

D65(daylight)andF11(artificiallight)standardilluminants.Theresultingvaluesmustberecordedinthetestreportsandmeasurementreportsaccordingly.

Inanycase,thecolorimetricevaluationsarecarriedoutinconsiderationofthecorrespondingglosslevels.Theselevelsmustalsobeenteredinthetestreportsandmeasurementreports.

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VW50190:2017-11

Forcolorimetricevaluationsofunpaintedplasticparts,thesemi-crystallinesamplestandardisal‐waysusedasareference,regardlessofthematerial.

Forcolorimetricevaluationsofleather,theleatherettevariantisalwaysusedasareference.

Therangeoffluctuationinthecolorvaluesfrom10individualmeasurementsmustnotexceed±0.15CIELABunits(exception:ΔL*).

Theevaluationissubjecttovisualacceptanceintheas-installedposition.

Thestandardtolerancevaluesspecifiedinthisstandardserveasatargetvalueatthestartofthesample-inspectionphase.Differentvaluesarepossibledependingonthematerialandthecolor

variant.Iftherearedeviatingtolerancevalues,theywillbenotedintheappropriateTechnicalSup‐plySpecification(TL),drawing,orsamplestandard,orcommunicatedtothetestingparties.Ifno

deviatingtolerancevalueshavebeenagreedupon,thespecificationsinthisstandardapply.

Ifacolorstandarddoesnotfeaturetherelevantgrain,theuseofthealternativegrainsfrom

table1

isrecommendedforthecolorimetricevaluation.

Table1

Grainnotavaila‐

ble

1stalternative

2ndalternative

K43

K31

-

K86

K31

-

K30

K31

-

K41

K31

-

K24

K31

-

K64

K09

K9A

K8A

K09

K9A

K9A

K09

-

K08

K09

K9A

K3A

K09

K9A

K2G

K09

K9A

K2K

K09

K9A

K50

K09

K9A

K77

K85

-

K3D

K85

-

FortheAudibrand,thecolortolerancesarealwaysindicatedonthebackofthecolorsamplestandards(see

appendixA

forexamples).Theglossspecificationsmustbeobtainedfromthe

I/GQ-L14representativeinchargeofthecomponent("GlossList").Dependingonthematerialandinstallationposition,exceptionscanbeagreeduponwiththeI/GQ-L14representativeinchargeofthecomponentifthisisrequiredforthevisualacceptance.Thevisualimpressionintheinstalled

positiontakesprecedenceoverthemeasurementinallcases.

Hence,thetolerancesindicatedin

section4.2

arenotbindingforAudiAG.

Page5VW50190:2017-11

4.2Tolerancespecifications

Threedeviationrangesarespecified:

–"OK"=(grade1)=Release

–"ConditionallyOK"(COK)=(grade3)=Qualityassurancecontrollimit,maybeusedcondition‐allywithdeviationpermit(AWE)

–"NotOK"(NOK)=(grade6)=Rejected

Theseconddecimalplaceofdeltavaluesisroundedasfollows:

<5=rounddown;≥5=roundup.

Tolerancesforsampleinspectionoftextilesthatareinsensitivetostrokingwithandwithoutstructure(e.g.,headlinerdecorativematerials,solid-coloredupholstery

materials)

4.2.1

See

table2

.

Table2

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|≤0.7

0.8≤|ΔL*|≤0.9

|ΔL*|≥1.0

|Δa*|≤0.3

0.4≤|Δa*|≤0.5

|Δa*|≥0.6

|Δb*|≤0.3

0.4≤|Δb*|≤0.5

|Δb*|≥0.6

4.2.2Tolerancesforsampleinspectionoftextilesthataresensitivetostrokingwithoutstructure(e.g.,loadcompartmenttrim,carpets)

See

table3

.

Table3

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|≤0.9

1.0≤|ΔL*|≤1.2

|ΔL*|≥1.3

|Δa*|≤0.3

0.4≤|Δa*|≤0.5

|Δa*|≥0.6

|Δb*|≤0.3

0.4≤|Δb*|≤0.5

|Δb*|≥0.6

4.2.3Basictoleranceforthesampleinspectionofnon-textilecomponentsorcomponentswithnon-textilesurfaces(colorgroupingasperinteriortrimcolors)

Blackcolors(e.g.,SatinBlack,TitaniumBlack,Anthracite)andbrowncolors(e.g.,NaturalBrown,Walnut,Tobacco,Sevilla,Buffalo)

See

table4

.

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VW50190:2017-11

Table4

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|<0.35

0.35≤|ΔL*|≤0.45

|ΔL*|>0.45

|Δa*|<0.25

0.25≤|Δa*|≤0.35

|Δa*|>0.35

|Δb*|<0.25

0.25≤|Δb*|≤0.35

|Δb*|>0.35

Graycolors(e.g.,ArtGray,PearlGray,ClassicGray,MoonRock,Seashell,St.Tropez)

See

table5

.

Table5

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|<0.45

0.45≤|ΔL*|≤0.55

|ΔL*|>0.55

|Δa*|<0.25

0.25≤|Δa*|≤0.35

|Δa*|>0.35

|Δb*|<0.25

0.25≤|Δb*|≤0.35

|Δb*|>0.35

Beigecolors(e.g.,PureBeige,SunBeige,CornSilk,LatteMacchiato,Nougat,NutriaBeige)andbluecolors(e.g.,NavyBlue,Petrol)

See

table6

.

Table6

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|<0.45

0.45≤|ΔL*|≤0.55

|ΔL*|>0.55

|Δa*|<0.25

0.25≤|Δa*|≤0.35

|Δa*|>0.35

|Δb*|<0.35

0.35≤|Δb*|≤0.45

|Δb*|>0.45

Greencolors(e.g.,ReedGreen,SteppeGreen)

See

table7

.

Table7

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|<0.45

0.45≤|ΔL*|≤0.55

|ΔL*|>0.55

|Δa*|<0.35

0.35≤|Δa*|≤0.45

|Δa*|>0.45

|Δb*|<0.25

0.25≤|Δb*|≤0.35

|Δb*|>0.35

Redcolors(e.g.,Grenadine,Teak,Sioux,DeepRed,Truffle,Furioso,TerraBrown)

ThesearecolorsthatareevaluatedwiththeparametersChroma"C*"andhue"H*"duetotheirpositionintheCIELABcolorspace.

See

table8

.

Page7VW50190:2017-11

Table8

"OK"range(1)

"COK"range(3)

"NOK"range(6)

|ΔL*|<0.35

0.35≤|ΔL*|≤0.50

|ΔL*|>0.50

|ΔC*|<0.40

0.40≤|ΔC*|≤0.55

|ΔC*|>0.55

|ΔH*|<0.25

0.25≤|ΔH*|≤0.35

|ΔH*|>0.35

4.2.4Tolerancesasafunctionoftheinstallationposition,surfacestructure,andmaterialgroup

Thereleasingpartycanassignafactortothebasetolerancesspecifiedintables2to8,dependingontheinstallationpositionandthesurfaceofthecomponentundertest.

Thefollowingfactorscanbeapplied:

–Mold-integratedtransitionsinadirectlyvisiblearea=basetolerance×1.

–Non-mold-integratedtransitionsaswellascomponentsinanareathatisnotdirectlyvisi‐ble=basetolerance×1.5.

–Forcomponentsthatareproducedfromanamorphousmaterial,thebasetolerancefor

parameterΔL*canbemultipliedbythefactor2.5,ifcomparisonwasmadeagainstthesemi-

crystallinecolorspecification.Thismethodcanalsobeusedwhencomparingleatherand

leatherette,providedthattheleathersamplehasbeencomparedagainsttheleatherettespeci‐fication.

–Forpaintedcomponentswithaglosslevel>20.0GU,thebasetoleranceforparameterΔL*canbemultipliedbythefactor2.5.

4.2.5Tolerancesandtargetvaluesforthesurfacegloss(GU)

Applicablearea:UnpaintedplasticpartsintheinteriortrimareawithgrainsK08,K09,K8A,K9A,K63,K2G,K3D,andK85

See

table9

.

Table9

Trimcolor

Targetvalue(GU)

OKtolerance

TitaniumBlack,SatinBlack,Anthracite,LatteMacchia‐to,NaturalBrown,etc.

2.0

±0.2

PearlGray,ClassicGray,Moonrock,ArtGray,Seashell,St.Tropez,etc.

2.2

±0.2

PureBeige,CornSilk,DesertBeige,LightBeige,etc.

2.8

±0.3

Applicablearea:UnpaintedplasticpartsininteriorareawithgrainsK31andK77

See

table10

.

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VW50190:2017-11

Table10

Trimcolor

Targetvalue(GU)

OKtolerance

TitaniumBlack,SatinBlack,Anthracite,LatteMacchia‐to,NaturalBrown,etc.

2.4

±0.3

PearlGray,ClassicGray,Moonrock,ArtGray,Seashell,St.Tropez,etc.

2.6

±0.3

PureBeige,CornSilk,DesertBeige,LightBeige,etc.

2.8

±0.3

Applicablearea:UnpaintedplasticpartsintheinteriortrimareawithgrainK29

See

table11

.

Table11

Trimcolor

Targetvalue(GU)

OKtolerance

TitaniumBlack,SatinBlack,Anthracite,LatteMacchia‐to,NaturalBrown,etc.

3.4

±0.3

PearlGray,ClassicGray,Moonrock,ArtGray,Seashell,St.Tropez,etc.

3.6

±0.3

PureBeige,CornSilk,DesertBeige,LightBeige,etc.

4.2

±0.4

Glossevaluationofassemblies(ASSYs)andfinishedpartsamples

ThetargetglossvaluesaredefinedbyVolkswagenDesign.Thetargetvaluesarenotedonthesamplestandards.Ifthisdataisnotpresent,

table9

to

table11

apply.

Componentgroupsandfinishedpartsamplesmustalwayshaveavisuallyharmoniousoverallim‐pression.ForcomponentsandindividualpartsofanASSYhavingthesamesurfacestructure

(grain),thedifferenceinglossunits(?GU)amongtheindividualpartsmustbe<0.4.Inthiscase,deviationsfromthetargetvaluesmayalsobeaccepted.

ComponentswithK31grainandGU>5.5ataglossmeterangleof60°mustnotbeaccepted.

Designation/classificationofgloss

See

table12

.

Table12

Designation

GU(60°angle)

Highgloss

70to100

Satingloss

45to70

Satinmatte

20to45

Matte

<20

Measurementconditionsfordeterminingtheglossunits(GU)

Glossunitsarealwaysmeasuredatareflectionangleof60°.Theexceptiontothisarehigh-glosssurfaces>70GU.Theyarecomparedwithareflectionangleof20°.

Page9VW50190:2017-11

4.3

Colormatching:Colorevaluationofcomponentgroupsandfinishedpartsamples(ASSYssuchassteeringwheels,overheadconsoles)

Componentgroupsandfinishedpartsamplesmustalwayshaveavisuallyharmoniousoverallim‐pression.

Inaddition,thefollowingappliestothefinishedpartsamplesoftheVolkswagenbrand:

Themaximumdeviationbetweensurfacesmadeofthesamematerialmustnotexceedthebasictolerance.Thisdoesnotapplytoareasnotdirectlyadjoiningeachother.Inthiscase,itmustbeensuredthatamaximumdeviationof|ΔL*|1.2amongallthematerialsisnotexceeded.Theindi‐vidualmaterialsmustbevisuallyacceptableaccordingtothesamplestandard.

InASSYscomprisingcomponentsmadeofamorphousand/orsemi-crystallinematerials,the

measurementdeviationsamongtheindividualcomponentsmustnotexceedthebasictolerance.

4.4Referencespecification

Unlessotherwiseagreedupon,thedesignreleasesamplewillserveasthereferencefortheVolks‐wagenbrand.Deviatingfromthisrule,theoriginalstandardmayalsobeused.Thereferencespec‐ificationisdocumentedonthesamplestandards.TherequiredreferencespecificationsarestoredintheVolkswagenMaterialsEngineeringPolymersdepartment(GQL-P).

4.4.1Finishedpartsample

Inthecaseofdesign-relatedcoloreffects,finishedpartsamplestandardsmustbecreatedinagreementwithVolkswagenDesign.Forcolorconsistencyrequirements,see

section4.3

.

5Testing

5.1Testequipment

–Thecolorimetricmeasurementsaretakenwithaspectrophotometer(

DINENISO11664-3

).

–Forpaintedandgrainedplasticsurfacesandpaintedmetalparts,45°/0andtheinverseisthesuitablegeometry.

–Forhigh-glosssurfaces,withtheexceptionofeffectcolorsandpaintcoatings,thed/8°geome‐trycanbeused.

–Fortestingtextilesurfaces,boththe45°/0andthed/8°geometriesandtheirinversesaresuit‐able.Ifthed/8°geometriesandtheinversesareapplied,theobtainedvaluesmustbecom‐

paredwiththosemeasuredwiththe45°/0devicewhichispreferredbythelaboratory.

–Since,forAudiAGparts,thepaintedsamplestandardisusedasacolorreferenceregardlessofthereflectionbehaviorofdifferentsurfaces,measurementsforAudiaregenerallycarried

outusingthed/8°geometry,excludinggloss(SCE).

–Thespectralresolutionofthecolorimetermustbenolessthan5nmandnogreaterthan

10nm.

–Therepeataccuracyofthemeasurementmustbe0.07ΔE*CIELAB.

–Thespectralmeasurementrangemustincludeatleasttherangefrom400to700nm.

–StandardilluminantD65asper

DIN5033-7

(forthe10°standardobserver)andartificialillumi‐nantF11asper

DIN6172

areused.Theseilluminantsarealsousedfordeterminingmetamer‐ism.

–Theglossmeasurementsaretakenwithaglossmeterasper

DINENISO2813

.

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5.1.1Calibrationandtestequipmentmonitoring

Priortostartingthemeasurement,themeasuringdevicemustbecalibratedasspecifiedbythemanufacturerofthedevice.

Itmustbeensuredthatthedevicehassufficientbatteryvoltagesinceinsufficientbatteryvoltagecancauseerroneousreadings.

Thetestequipmentmustbeinspectedatregularintervals.Tocheckthedeviceconsistency,the

ΔL*-,Δa*-,andΔb*valuesofthecurrentlymeasuredtestsheetmustbecomparedtotheoriginallymeasureddatasetforconstancy.Thedatamustbeloggedaccordingly.Achromaticteststandardwithhighcolorconsistencymaybeusedasatestsheet(ideallyachromatic,greencolor).

Tocheckthesamplestandard,aregularcomparisonmeasurementwithrespecttotheL*,a*,b*valuesstoredinthedevice,whichweredeterminedafterreceivingthesamplestandard,mustbetaken.Thedatamustbeloggedaccordingly.

Allmeasurementsrequiredforcalibrationandtestequipmentmonitoringmustbeperformedatroomtemperature

VW50554

–2.

Ifdeviatingvaluesaredetermined,appropriatemeasuresmustbetaken(equipmentinspectionorcreationofanewsamplestandard).

5.2Specimenpreparation

Thespecimensmustbevisuallycheckedforinhomogeneitiesofthegrainandtheglosslevel.Thesurfacemustbefreeofsoiling.Areasshowingdamagenotintentionallycausedfortestingpurpo‐ses(e.g.,scratchtest,stresswhitening)mustbeexcludedfromthemeasurement.Plasticparts

andpaintedpartsrequirenospecificpreparationforthetest.

Textilesthataresensitivetostrokingmustbebrushedbeforethestartofthemeasurement,first1xagainstthepiledirection(specimenappearsdarker),then10xinthepiledirection(specimenap‐

pearslighterandstructureappearsmorehomogeneous).Aclothingbrushwithpolyesterbristlesofapproximately18mmlengthand0.3mmthicknessmustbeused.

Withneedle-punchednon-wovenmaterial,itissufficienttostrokethematerialbyhand,ensuring

thatthehandiscleanandfreeofgrease,first1xagainstthepiledirection(specimenappearsdark‐er),then10xinthepiledirection(specimenappearslighterandstructureappearsmorehomoge‐

neous).

Textilesthatarenotsensitivetostrokingrequirenopreparation.

Withmulti-colorfibersystems,possiblespottinessmustberuledout.

5.3

5.3.1

Measurementprocedure

Generalrequirements

Themeasurementopeningmustbematchedtothespecificspecimenshape.Inthecaseoftextilespecimens,aslargeameasuringopeningaspossiblemustbeselected.

Flat-planesurfaceswithnopressuremarksmustbeselectedforthemeasurementareas.

Whenselectingthemeasuringpoints,itmustbeensuredthattheyaredistributedovertheentirespecimensurfaceandareatleast3cmfromtheedgewherepossible.

Fortranslucenttextiles,abackingmustbeselectedthatcorrespondstotheundercutofthefinish‐edpartorsamplestandardsmustbecreatedfromthefinishedpart.Forthesematerials,thesam‐plestandardsdonotapplytoproductsofpre-manufacturingprocesses.

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VW50190:2017-11

5.3.2Measuringthesamplestandard

Forthereleaseofasamplestandard,onlyameasuringdevicewithaninstrumentagreement<0.20ΔE*CIELABwithrespecttotheVolkswagenmasterdevicemustbeused.

Thesamplestandardsofthefollowingmaterialsmustbesubjectedtoatleastfiveindividualmeas‐urementsdistributedovertheentireareaofthedefinedsurface(see

figure1

and

figure2

):Plasticpanels,paintedplasticpanels,coatedpanels,films,leather,andleatherette.Forthepaintedsam‐plestandardsofAudiAG,thegrainedareamustbescanned.Ifthesmoothsurfaceisusedasref‐erence,thismustbeexplicitlystatedonthetolerancelabelonthebackoftheplasticpanel(see

figureA.2

).

Fortextilesamplestandardswith45°/0geometry,tenindividualmeasurementsmustbetaken(see

figure3

)andthemeanvaluemustbedetermined.Whenusingadevicewithasphericalshape,thespecimenmustbeturned90°3timeseachtodetermineonemeasuredvalue(see

figure4

).Inthiscase,themeanvalueisdeterminedfromfivemeasuredvalues.

Duringtheevaluationofaspecimen,samplestandardswillnotbeconstantlyre-measured,aser‐rorscanbecarriedoverfromthehandlingofthesamplestandard,includingsoiling,totheevalua‐tionofthespecimen.Arepeatedmeasurementonlyservesasaqualitycheckofthesamplestand‐

ard.

Figure1–Samplestandardsheetwithone

definedsurface

Figure3–45°/0-0/45°(circular)

Figure2–Samplestandardsheetwithseveralfieldsofdefinedsurfaces

Figure4–d/8°-8°/dsphere

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VW50190:2017-11

5.3.3Measurementonthecomponent/onspecimens

Forplasticspecimens(paintedorunpainted),preferablyfive(butatleastthree)individualmeas‐urementsmustbetaken,distributedovertheentirespecimensurface.

Fortextilespecimens,tenindividualmeasurementsmustbetakenwith45°/0geometryandthe

meanvaluedetermined.Whenusingadevicewithasphericalshape,thespecimenmustbe

turned90°3timeseachtodetermineonemeasuredvalue.Inthiscase,themeanvalueisdeter‐minedfromfivemeasuredvalues.Themeasuringpointsmustbeagreeduponinadvanceamongthetestingparties.

6Requirementsforstylingreleasesamples,originalstandards,andsamplestandardsfortheVolkswagenbrand

Theoriginalstandardsandsamplestandardsmustcorrespondtothestylingreleasesample.

Thesamplestandardsmustbestoredwithinaprotectivesleeveinadark,dry,coolplaceinordertoavoidvisualchanges.Thevisuallyrelevantsideiscoveredwithasheetofrough,neutralgraysheetofrecyclingpaperinsidetheprotectivesleeve.

TheshapeofthecoverandthelabelingoftheVolkswagensamplestandardmustcorrespondtotheVolkswagenCorporateDesignspecifications,sothattheyareclearlytobeidentifiedasVolks‐wagensamplestandards.

ThesamplestandardsofAudiAGmustcomplywiththedesignshownin

appendixA

:

FigureA.1

Measurementonstructure

FigureA.2

Measurementonsmoothsurface

FigureA.3

SamplestandardcoverISOA5format

Unlessotherwiseagreed,alloriginalsamplesandsamplestandardsmustbearalabelthatspeci‐fiesthefollowing:Samplestandard,colorcode,colordesignation,issuedate.

Themeasurementconditions(intheformofdetailsonthemeasurementsystemused)andthede‐viationofthecolorcoordinatesasperCIELABoftherespectivesamplestandardfromthestylingreleasesample/originalstandardmustbedocumentedwithintheframeworkofalaboratorytest.

Minimumdimensions:

–Forpaintedplasticswithoutgrain:FormatISOA6,

–Forpaintedandunpaintedplasticswithgrain:FormatISOA5,

–Forallothermaterials(films,leatherette,leather,textiles):FormatISOA4orISOA5.

Thespecifiedtolerancelimitforsamplestandardsisapproximately1/3ofthespecifiedproductiontolerancevalidforthesematerials.

7Evaluation

Thespecimensareevaluatedforcolor,gloss,structure,andsurface,aswellasfortheirworkman‐ship.Thecolorisevaluatedbymeasurement(asper

DINENISO11664-4

),comparingtheresultsagainstthemeasureddataoftheoriginalstandard.

Theglosslevelistestedastheglossmetervalueatthetestangle60°asper

DINENISO2813

andspecifiedinthereport.Unlessotherwiseagreed,thereferencedefinedforthesurfacetobetestedapplies(see

section4.4

).

Page13VW50190:2017-11

8Non-measurableparts

VisualevaluationagainstthesamplestandardaccordingtoTestSpecification

PV3965

isper‐formedfollowingprioragreementorincaseofcomponentsthatarenotmeasurableduetotheirshape.

Incaseofvisualevaluations,thedeviationofthesamplestandardfromtheoriginalstandardmustbetakenintoaccount.

9EvaluationofchromesurfacesincolorVCR-3Q7Aluminum

9.1Colorevaluation

FortheevaluationofchromesurfacesincolorVCR-3Q7,theusualapproachisthesameasforothersurfaces,i.e.,visualcomparisonofthecomponentandoriginalsample(see

figure5

).

Figure5

9.2Glossevaluation

Todeterminetheproperglossormattelevel,thecomponentisbroughtclosetotheeyeofthe

evaluator(see

figure5

).Insodoing,theevaluatorwatchesthereflectionofhiseye.Ifalldetails,suchastheeyelashes,eyebrows,andiris,aredistinctlyvisible(see

figure6

),thechromesurfaceistooglossyanddoesnotmeetthespecificationVCR-3Q7.

Figure7

showsanexampleforthe

reflectionofamatteVCR-3Q7chromesurface.

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VW50190:2017-11

Figure6–NotOK:Thereflectionisdistinctly

visible=componentistooglossy

Figure7–OK:Matte,onlya"blurry"reflection

isvisible

10Testreport

ForcolorswithchromavalueC*ab<5,theabsolutevaluesL*,a*,b*andthedifferencevalues