Designation:E1809–9601StandardTestMethodforMeasurementofHigh-VisibilityRetroreflective-ClothingMarkingMaterialUsingaPortableRetroreflectometer1ThisstandardisissuedunderthefixeddesignationE1809;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementoftheretroreflectivepropertiesofhighvisibilitypedestriangarments,suchasvests,usingaportableretroreflectometerthatcanbeusedinthefield.Theportableretroreflectometerisahand-heldinstrumentwithadefinedstandardgeometrycorrespondingtoUnitedStatesusagethatcanbeplacedincontactwithretroreflectivemarkingmaterialtomeasuretheretroreflection.Themeasurementscanbecomparedtominimumrequirementstodeterminetheneedforreplacementoftheretroreflectivematerial.1.2Thistestmethodisdesignedformeasuringretroreflectivemarkingmaterialsthathaveanareaequaltoorgreaterthanthatoftheapertureoftheretroreflectometer.1.3Thistestmethodisintendedtobeusedforfieldmeasurementofretroreflectivemarkingmaterials,butmaybeusedtomeasuretheperformanceofmaterialsbeforeplacingtheclothinginuse.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:E284TerminologyofAppearance21ThistestmethodisunderthejurisdictionofASTMCommitteeE-12onColorandAppearanceandisthedirectresponsibilityofSubcommitteeE12.10onRetroreflection.CurrenteditionapprovedMayDec.10,1996.2001.PublishedJFebruary2002.OriginallypublishedasE1809-96.LastpreviouseditionE1809-96.1ThisdocumentisnotanASTMstandardandisintendedonlytoprovidetheuserofanASTMstandardanindicationofwhatchangeshavebeenmadetothepreviousversion.Becauseitmaynotbetechnicallypossibletoadequa...
