Designation:D602−81(Reapproved2012)StandardSpecificationforBariumSulfatePigments1ThisstandardisissuedunderthefixeddesignationD602;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversthebariumsulfatepigmentscommerciallyknownasbarytesandblancfixe.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2D185TestMethodsforCoarseParticlesinPigmentsD280TestMethodsforHygroscopicMoisture(andOtherMatterVolatileUndertheTestConditions)inPigmentsD715TestMethodsforAnalysisofBariumSulfatePigmentD1208TestMethodsforCommonPropertiesofCertainPigments3.CompositionandProperties3.1Thepigmentshallconsistofbariumsulfate(BaSO4)withoutanyadmixtureofothermaterialsinthecaseofblancfixe,andwithoutanyadmixtureofothermaterialsnotnaturallyoccurringinthebariteoreinthecaseofbarytes,andwhichconformtothefollowingrequirements:BarytesBlancFixeBariumsulfate,min,%9497Ferricoxide,max,%0.050.02pH,min3.53.5Mattersolubleinwater,max,%0.20.2Moistureandothervolatilematter,max,%0.50.5Coarseparticles(totalresidueretainedonNo.325(45-µmsieve),max,%0.50.5Freesilica(quartz,clays,orotherforeignmaterials),max,%2.02.03.2Insuchphysicalpropertiesasarespecifiedbythepurchaser,thepigmentshallsatisfactorilymatchareferencesamplemutuallyagreeduponbythepurchaserandtheseller.4.Sampling4.1Twosamplesshallbetakenatrandomfromdifferentpackagesfromeachlot,batch,day’spack,orotherunitofproductioninashipment.Whennomarkingsdistinguishingbetweenunitsofproductionappear,samplesshallbetakenfromdifferentpackagesintheratiooftwosamplesofeach5000kg(10000lb),exceptthatforshipmentsoflessthan10000lbtwosamplesshallbetaken.Attheoptionofthepurchaser,thesamplesmaybetestedseparatelyorafterblendinginequalquantitiesthesamplesfromthes...
