ASTMDY90989W075953000381423W#TBDesignation:D4909-89AMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceSI.,Philadelphia,Pa.19103ReprinledfromlheAnnualBookofASTMStandards,CopyrightASTMIfnotlisledinlhecurrentcombinedindex,willappearinlhenextedition.StandardTestMethodforColorStabilityofVinyl-CoatedGlassTextilestoAcceleratedWeathering’ThisstandardisissuedunderthefixeddesignationD4909;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.,,-.I-l.Scope1.1Thistestmethodcoversaprocedureforevaluatingthecolorchangeofvinyl-coatedglassyarntextiles,suchasyarns,insectscreening,solarscreening,andlouvercloth,afterexposureinatestapparatuswithcontrolledwettingofthespecimenbywaterspray,controlledrelativehumidity,andemployinganopen-flamecarbonarclightsource.1.2ThistestmethodshowsthevaluesinbothSIunitsandinch-poundunits.“SIunits”isthetechnicallycorrectnameforasystemofmetricunitsknownastheInternationalSystemofUnits.“Inch-poundunits’’isthetechnicallycorrectnameforthecustomaryunitsusedintheUnitedStates.Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesinSIunitsareprovidedforinformationonly.1.3Thisstandardmayinvolvehazardousmaterials,oper-atioiis,andeqiiipmeiit.Thisstandarddoesnotpurporttoaddressallofthesafityproblemsassociatedwithitsuse.Itis[lierespoiisìbìiityofthetiserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection7.2.ReferencedDocuments2.iASTMStandards:D123TerminologyRelatingtoTextiles2D2258PracticeforSamplingYarninTesting2E171SpecificationforStandardAtmospheresforCondi-2.2AATCCStandards:11IAWeatherResistance:SunshineArcLampProcedureEvaluationProcedure1:GrayScaleforColorChange43.iDeJinitiorts:3.1.Iatmospherefortestingtextiles,n-forglass,airmaint...
