Designation:D7307−21StandardPracticeforSamplingofThermoplasticPavementMarkingMaterials1ThisstandardisissuedunderthefixeddesignationD7307;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheproperfieldsamplingofther-moplasticpavementmarkingmaterialstoensuretestresultsarerepresentativeofthematerialbeingtested.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D346PracticeforCollectionandPreparationofCokeSamplesforLaboratoryAnalysisD2013PracticeforPreparingCoalSamplesforAnalysis3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1thermoplasticpavementmarkingmaterial,n—ahighlyfilled100%totalsolidshighwaymarkingmaterialthatwhenheatedtoamoltenstatecanbeextrudedorsprayedontoaroadsurfaceandwhencooledformsasolid,durabledelineator.4.SummaryofPractice4.1Arandomselectionofthreebagsofthermoplasticpavementmarkingmaterialismadefromamanufacturedlot.Usingoneofthethreesizereductionmethodsoutlinedinthisprocedureasmall,representativesampleofthemanufacturedlotisobtained.Thissamplemaythenbeusedforthetestingofthechemicalandphysicalpropertiesofthemarkingmaterial.5.SignificanceandUse5.1Itisimportanttoobtainatrulyrepresenta...
