【astm標(biāo)準(zhǔn)】d 3964 - 10 (2015)

1、Designation:D3964?10(Reapproved2015)StardPracticefionofCoatingSpecimensfAppearanceMeasurements1ThisstardisissuedunderthefixeddesignationD3964thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninth

2、ecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thispracticeprovidesaguidetoionofspecimensfappeara

3、ncemeasurementbyreflectedlightaswellasadiscussionoffactstobeconsideredintheirpreparationfmeasurement.Stardizedionpresentationprocedureswillassistinachievingagreementbetweenevaluationscarriedoutindifferentlabatiesaswellas

4、helpingtoachievebettercrelationsbetweenvisualevaluationsinstrumentalmeasurements.NOTE1—ThisstardisnotapracticefpreparationoftestpanelsofcoatingsseePracticesD823.1.2Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifan

5、yassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2D823PracticesfProducing

6、FilmsofUnifmThicknessofPaintVarnishRelatedProductsonTestPanelsE284TerminologyofAppearance3.Terminology3.1Definitions:3.1.1FdefinitionsoftermsusedinthispracticerefertoTerminologyE284.4.SignificanceUse4.1Manyofthespecimens

7、thatareregularlysubmittedtomeasurementdepartinsomedegreefromtheidealrequirements.Fthisreasoninstrumentalreadingsareaffectedimptantlybythemannerinwhichspecimensareedpresentedfmeasurement.Reproduciblemeasurementsarefacilit

8、atedbystardizationcontroloftestconditions.5.GeneralRequirements5.1ion—Inmakingappearancemeasurementsitisimptantthatthespecimensedberepresentativeofthematerialofinterest.Onceedthespecimensmustbecarefullyexaminedtodetermin

9、eiftheyaresuitablefmeasurementifnottheymustbecleanedotherwiseprepared.Carefulattentiontothesefactsisnecessaryifthemeasurementsaretobevalid.5.2SpecimenSize—Theminimumsizeisdictatedbythesizeofthespecimenptoftheinstrumentto

10、beusedfmeasurement.Whenaninstrumentprovidesachoiceofspecimenptsizesusethelargestptthatcanbecompletelycoveredbythespecimen.Alargemeasuredareahelpstominimizetheeffectofanysmallareanonunifmityistherefemelikelytoprovideresul

11、tsthatagreewiththeinvoluntaryaveragingthattakesplacewhenspecimensareobservedvisually.Inadditionalargespecimenalsopermitstheoperattomakemeasurementsonseveralareasofthespecimenwhendesiredtherebyprovidingfurtherspecimenaver

12、aging.5.3Opacity—Fdeterminationofglosscolanopaquespecimenshallbeedwheneverpossible.Whenthespecimenistranslucenttransparentthefollowingpracticesshallbeimplemented:5.3.1FGlossEvaluation—Thespecimenshallpreferablybesufficie

13、ntlythickthatasecondaryreflectionfromthebacksecondsurfaceofthespecimencannotenterthereceptopticsoftheglossmeter.Whenthintransparentspecimensmustbemeasuredadoptoneofthefollowingprocedures:5.3.1.1Backthespecimenwithalighta

14、bsbingmaterialofthesamerefractiveindexasthespecimeninopticalcontactwithit.5.3.1.2Useanagreeduponspecimenthicknessincludingcoatingsubstrateplaceablackbackingbehindthespecimen.5.3.2FColEvaluation—Thechoiceofbackingofevensl

15、ightlytranslucentspecimenswillaffecttheirmeasurement.Usethemostapplicableofthebackingtechniquesthatfollow.1ThispracticeisunderthejurisdictionofASTMCommitteeD01onPaintRelatedCoatingsMaterialsApplicationsisthedirectrespons

16、ibilityofSubcommitteeD01.26onOpticalProperties.CurrenteditionapprovedJuly12015.PublishedJuly2015.iginallyapprovedin1980.Lastpreviouseditionapprovedin2010asD3964–10.DOI:10.1520D396410R15.2FreferencedASTMstardsvisittheASTM

17、websitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.Uni

18、tedStates1Ineachcaseitisessentialthatthebackingmaterialcolbereproduciblestabledurablefreliableresults.5.3.2.1Backthespecimenwiththesamematerialwithwhichitwillbebackedinitsintendeduse.5.3.2.2Backthespecimenwithidenticalsi

19、milarmaterial.5.3.2.3Backthespecimenwithaneutralmaterialwhoseluminousreflectanceisessentiallythesameasthatofthespecimenbeingevaluated.5.3.2.4Backthespecimenwithablacksurfacesuchasapaintedpanelblackglass.5.3.2.5Backthespe

20、cimenwithawhitebackingofknownreflectance.6.PhysicalProperties6.1Thespecimenshallpreferablyberigidhaveaplanesurface.Specimensofthinflexiblematerialthatcanbulgesagwhenpresentedtoaninstrumentrequirespecialholdingequipment.W

21、henthespecimenismoderatelyflexibleaplanesurfacemaybeachievedbypressingthespecimenagainsttheinstrumentwithaflatrigidobject.Thepressingtechniquemustbereproducible.Avacuumplatespeciallydesignedclampingdevicehasprovensatisfa

22、ctyinsomeapplications.Notethatspecimenscoatedonthinplasticfilmpapermaytrapairbetweenthespecimentheholder(vacuumplateclampingdevice)causingthespecimentobillow(blister)resultinginerroneousreadings.6.2SurfaceTexture—Somecoa

23、tingshavepronouncedsurfacetexturemakingitdesirabletorotateaspecimeninitsownplane.Thosewithmarkeddirectionalityusuallyduetotheproductionprocesswillhavedifferentvalueswhenmeasuredindifferentdirections.Goodpracticedictatest

24、hatmeasurementsbemadewiththeplaneofmeasurementoftheinstrumentbothparalleltoaswellasperpendiculartotheprocessdirection.7.CleaningofSpecimens7.1Thespecimenshallbeclean.Thereshouldbenodirtdustoilfeignmaterialonthesurfacetha

25、twillaffecttheinstrumentalevaluationofthespecimen.Ifthespecimenappearstorequirecleaningtheprocedureshouldbeagreeduponitshouldbecarriedoutwithcare.Anycleaningofalowglossfragilesurfacemayscratchpolishthesurfacethuschangeth

26、eappearanceofthespecimenrenderituselessfmeasurement.Ahighglossspecimenmayusuallybewashedwithclearwaterblottedwithuntreatedlenstissuepapertowel.Ifthespecimenisdurableamildnonfluescentnonionicdetergentthatdoesnotleaveafilm

27、canbeusedwithasoftclothbristlebrush.Ifthespecimenisdurablehasanoilystubbncontaminationthatshouldberemovedreagentgradeisopropylalcoholmaybeused.Followallcleaningtechniqueswithawarmwaterrinsedryingbyblottingusinguntreatedl

28、intfreepapertowel.NOTE2—Ceramicpcelainenameledinstrumentcalibrationstandardsrequireperiodiccleaningtheaboveprocedurescangenerallybeusedsafely.Careshouldbetakentoensurethatnowaterothercleaningagententerstheedgesofthesesta

29、rds.8.HlingSpecimens8.1Hlespecimensbytheiredges.Donotallowobjectstocontactthefrontsurfaceofthespecimen.Whenplacingthespecimenontheinstrumentavoidslidingitacrossthespecimenpt.9.Rept9.1Whenthespecimenssubmittedfappearancem

30、easurementsdepartfromtheidealrequirementsreptthefollowing:9.1.1Theircondition(Section6)9.1.2Methodofcleaning(Section7)9.1.3Methodofbacking(5.3.15.3.26.1)9.1.4Indicatedirectionofspecimensubmittedfmeasurementaveragingofdat

31、abothwhenrequiredbydirectionality(6.2).10.Keywds10.1appearancecolglossmeasurementopacityunifmityASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstard.Us

32、ersofthisstardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrightstheriskofinfringementofsuchrightsareentirelytheirownresponsibility.Thisstardissubjecttorevisionatanytimebytheresponsibletechnicalcommitt

33、eemustbereviewedeveryfiveyearsifnotrevisedeitherreapprovedwithdrawn.YourcommentsareinvitedeitherfrevisionofthisstardfadditionalstardsshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsider

34、ationatameetingoftheresponsibletechnicalcommitteewhichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStardsattheaddressshownbelow.ThisstardiscopyrightedbyA

35、STMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959UnitedStates.Individualreprints(singlemultiplecopies)ofthisstardmaybeobtainedbycontactingASTMattheaboveaddressat6108329585(phone)6108329555(fax)(email)t