Designation:D1442−06(Reapproved2012)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-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1440TestMethodforLengthandLengthDistributionofCottonFibers(ArrayMethod)D1447TestMethodforLengthandLengthUniformityofCottonFibersbyPhotoelectricMeasurementD1464PracticeforDifferentialDyeingBehaviorofCottonD1776PracticeforConditioningandTestingTextilesD2480TestMethodforMaturityIndexandLinearDensityofCottonFibersbytheCausticaireMethod(Withdrawn1992)3D7139TerminologyforCottonFibers3.Terminology3.1ForallterminologyrelatingtoD13.11,CottonFibers,refertoTerminologyD7139.3.1.1Thefollowingtermsarerelevanttothisstandard:cottonfibermaturity,immaturefibers,intestingwithsodiumhydroxidesolutions(SeeFig.1andFig.2),immaturefibers,observedunderpolarizedlight,lumen,maturefibers,intestingwithsodiumhydroxidesolutions(s...
