Designation:D50−90(Reapproved2011)StandardTestMethodsforChemicalAnalysisofYellow,Orange,Red,andBrownPigmentsContainingIronandManganese1ThisstandardisissuedunderthefixeddesignationD50;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thesetestmethodscoverproceduresforthechemicalanalysisofyellow,orange,red,andbrownpigmentscontainingironandmanganese.Thetestmethodsapplyspecificallytothefollowingpigments:synthetichydratedyellowironoxide,yellowocher,redandbrownironoxides,rawandburntumber,rawandburntsienna,andvenetianred.1.2Theanalyticalproceduresappearinthefollowingorder:ASTMMethodRefer-DryPigmentsSectionsencesMoistureandOtherVolatileMatter6D280LossonIgnition7CoarseParticles8D185MatterSolubleinWater9D1208OrganicColoringMatter10IronOxide11and12CalciumCompounds(ReportedasCaO)13and14SulfatesSolubleinHydrochloricAcid15and16LeadChromate(inOchers)17CalciumCarbonate(inVenetianRed)18C25Manganese(inSiennasandUmbers)19and20PigmentPastesinOilPigmentContent21D1208MoistureandOtherVolatileMatter22D1208NonvolatileMatterinVehicle23MoisturebyDistillation24D1208CoarseParticlesandSkins25D185Consistency(Stormer)26D5621.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortous.2.ReferencedDocuments2.1ASTMStandards:2C25TestMethodsforChemicalAnalysisofLimestone,Quicklime,andHydratedLimeD185TestMethodsforCoarseParticlesinPigmentsD280TestMethodsforHygroscopicMoisture(andOtherMatterVolatileUndertheTestConditions)inPigmentsD562TestMeth...
