Designation:D686–93(Reapproved2007)AnAmericanNationalStandardStandardTestMethodsofQualitativeExaminationofMineralFillerandMineralCoatingofPaper1ThisstandardisissuedunderthefixeddesignationD686;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscovertwoproceduresforthequali-tativedeterminationandidentificationofthemineralconstitu-entsoffilledandcoatedpapers.1.2Duetothesimilarityinchemicalcompositionandphysicalsizeandshapeofsomeofthevariouspossibleconstituentscontainedinagivenpaperspecimen,morepre-cise,quantitativemethodsmayattimesberequiredforpositiveidentification.1.3Itisrecommendedthatonebecomethoroughlyfamiliarwiththesetestmethodsbyanalyzingpapersamplesofknownmineralcomponentcontent.1.4Thetestmethodsappearasfollows:SectionsMethodA—QualitativeChemicalAnalysis4to11MethodB—MicroscopicalIdentification12to191.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThesetestmethodsaretechnicallyequivalenttoTAPPIT421.2.ReferencedDocuments2.1ASTMStandards:2D585PracticeforSamplingandAcceptingaSingleLotofPaper,Paperboard,Fiberboard,andRelatedProductD586TestMethodforAshinPulp,Paper,andPaperProducts33D921Discontinued1980;MethodofTestforTitaniumDioxideinPaper3D1030TestMethodforFiberAnalysisofPaperandPaper-board2.2TAPPIStandards:4T401FiberanalysisofpaperandpaperboardT438ZincandcadmiuminpaperandpigmentsT421Qualitative(IncludingOpticalMicroscopic)Analy-sisofMineralFillerandMineralCoatingofPaper3.SignificanceandUse3.1Qualitativechemicalanalysesofthemineralcomponentofapaperspecimen,TestMethodA,servetoidentifytheionsofanysuchminerals.Theresultsmaythenbeinterpret...
