Designation:D4462−02(Reapproved2019)StandardSpecificationforZincHydroxyPhosphitePigment1ThisstandardisissuedunderthefixeddesignationD4462;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThisspecificationcoversazinchydroxyphosphitepigmenthavingthegeneralformulaZnHPO3·[ZnO·2Zn(OH)2].1.2Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D185TestMethodsforCoarseParticlesinPigmentsD280TestMethodsforHygroscopicMoisture(andOtherMatterVolatileUndertheTestConditions)inPigmentsD281TestMethodforOilAbsorptionofPigmentsbySpatulaRub-outD4450TestMethodforAnalysisofZincHydroxyPhosphitePigment3.CompositionandProperties3.1ThepigmentshallconsistofzinchydroxyphosphiteandshallconformtotherequirementsinTable1.3.2Themasscolorofthedrypigmentiswhite.Theshadeandtintingstrength,whenspecified,shallbewithinmutuallyagreeduponlimitsofareferencesampleacceptablebythepurchaserandthesellerastestedinanagreedtestprocedure.4.Sampling4.1Twosamplesshallbetakenatrandomfromdifferentpackagesfromeachlot,batch,day’spack,orotherunitofproductioninashipment.Whennomarkingsdistinguishingbetweenunitsofproductionappear,samplesshallbetakenfromdifferentpackages,intheratiooftwosamplesforeach10000lb(4545kg),exceptthatforshipmentsoflessthan10000lbtwosamplesshallbetaken.Attheoptionofthepurchaser,thesamplesmaybetestedseparatelyorafterblendinginequalquantitiesthesamplesfromthesameproductionunittoformacompositesample.5.TestMethods5.1Testsshallbeconductedinaccordancewiththefollow-ingASTMtestmethods.TestproceduresnotcoveredbyASTMtestmethodss...
