Designation:D6942−03(Reapproved2019)StandardTestMethodforStabilityofCelluloseFibersinAlkalineEnvironments1ThisstandardisissuedunderthefixeddesignationD6942;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesaprocedurefordeterminingtheeffectofexposuretoalkalineenvironmentsonthestrengthofcellulosefibers.AnalkalineenvironmentisdefinedtobeanymatrixinwhichthepHisgreaterthan8foraperiodof2ormorehours.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1348TestMethodsforMoistureinCellulose(Withdrawn2017)3D1695TerminologyofCelluloseandCelluloseDerivatives2.2TAPPI(TechnicalAssociationofthePulp&PaperIndustry)Standards:T205FormingHandsheetsforPhysicalTestsofPulp4T231Zero-spanBreakingStrengthofPulp(DryZero-spanTensile)43.Terminology3.1Definitions—Forstandardterminologyofcelluloseandcellulosederivatives,seeTerminologyD1695.4.SummaryofTestMethod4.1Thistestmethodcanbeusedtocomparedifferentcellulosepulpfibertypesbasedontheirresponsetoastandardalkalinesolution.Thestabilityfactordefinedbelowcanbeusedtomeasuretheeffectofexposuretoalkalineconditionsonfiberstrength.4.2Cellulosefibersaretreatedwithastandardalkalinesolutionforas...
