Designation:D1442−06(Reapproved2019)StandardTestMethodforMaturityofCottonFibers(SodiumHydroxideSwellingandPolarizedLightProcedures)1ThisstandardisissuedunderthefixeddesignationD1442;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheper-centageofmaturefibersinasampleofloose,chemicallyuntreatedcottonfibers,whethertakenbeforeprocessingorunravelledfromatextileproduct.1.2Thistestmethodgivestwooptionalproceduresfordeterminingmaturity,asfollows:1.2.1Procedure1—SodiumHydroxideSwelling.1.2.2Procedure2—PolarizedLight.NOTE1—ForothertestmethodsforthedeterminationofmaturityofcottonfibersrefertoTestMethodsD1464andD2480.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasureareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1440TestMethodforLengthandLengthDistributionofCottonFibers(ArrayMethod)D1447TestMethodforLengthandLengthUniformityofCottonFibersbyPhotoelectricMeasurementD1464PracticeforDifferentialDyeingBehaviorofCottonD1776PracticeforConditioningandTestingTextilesD2480TestMethodforMaturityIndexandLinearDensityofCottonFibersbytheCausticaireMethod(Withdrawn1992)3D7139TerminologyforCottonFibers3.Terminology3.1Foralltermi...
