Designation:D4797−12aStandardTestMethodsforGravimetricAnalysisofWhiteandYellowThermoplasticTrafficMarking1ThisstandardisissuedunderthefixeddesignationD4797;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThesetestmethodscoverproceduresforthegravimetricanalysisofthebinderandhydrochloricAcid(HCL)insolubleparticlesinwhiteandyellowthermoplastictrafficmarkings.TheHCLinsolubleparticlescanberetroreflectiveoptics,suchasglassbeadsorsomeothertypeofretroreflectiveoptic,ornon-retroreflectiveparticlessuchassilicasand,oracombina-tionofanytwoormoreofthesematerials.1.2ThisstandarddoesnotaddressthephysicalseparationandtheindividualquantificationofeachcomponentwhenamixtureoftwoormoreHCLinsolublematerialsispresent.RatheritrequirestheusertovisuallyevaluatetheHCLinsolublematerial(obtainedfromfollowingthistestmethod)andreportthetypesofmaterialspresent.1.3Thisstandarddoesnotpurporttoaddressthetitaniumdioxideorleadchromatepigmentmeasurement(afterashing)whichisdetailedinTestMethodsD1394andD126.1.4Thisstandardwillattempttoaddresstheinterferenceoforganicpigmentswiththebinderresults.1.5Theanalyticalproceduresappearinthefollowingorder:SectionsPercentBinder10PercentRetroreflectiveOpticsorNon-RetroreflectiveParticles111.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D126TestMethodsforAnalysisofYellow,Orange,andGreenPigmentsContainingLeadChromateandChro-miumOxideGreenD1394TestMethodsforChemicalAnalysisofWhiteTita-niumPigmentsD7307PracticeforSamplin...
