Designation:D3723−05(Reapproved2011)StandardTestMethodforPigmentContentofWater-EmulsionPaintsbyLow-TemperatureAshing1ThisstandardisissuedunderthefixeddesignationD3723;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedureforthepigmentcontentdeterminationofwater-basedpaints.Itisapplicableonlytopigmentsthatdonotdecomposeorloseweightattemperaturesbelow500°C.Suchpigmentsincludemostmetaloxides,silicates,andamajorityofanhydrousinorganicsalts.1.2Manywater-basedpaintscontainpigmentsandorganiccolorantsthatlosewaterofhydrationordecomposeatthistemperature.Theresidualashshouldbecarefullyinspectedforchangesincolorortexturethatcouldindicateapigmentalterationandhenceleadtoerroneousresults.Cautionshouldthereforebeexercisedwhenapplyingthistestmethodtosamplescontainingunknownpigmentcompositions.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWater3.SignificanceandUse3.1Thistestmethodisusedbypaintproducersandcon-sumersforproductprocesscontrolandforproductacceptance.4.Apparatus4.1Oven,forceddraft,maintainedat10562°C.4.2Furnace,muffle,maintainedat450625°C.4.3Syringe,5-mL.4.4AluminumFoilDish,58mmindiameterby18mmhighwithaflatbottom.Thebottomofthedishshouldbeasnearlyflataspossiblesothatauniformfilmisproduced.5.Reagents5.1PurityofReagents—Reagentgradechemicalsshallbeusedinalltests.Unlessotherwiseindicated,itisintendedthatallreagentsshallconformtothespecificationsoftheCommit-teeonAnalyt...
