Designation:D1720−03(Reapproved2012)StandardTestMethodforDilutionRatioofActiveSolventsinCelluloseNitrateSolutions1ThisstandardisissuedunderthefixeddesignationD1720;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofthevolumeratioofhydrocarbondiluenttoactivesolventrequiredtocausepersistentheterogeneity(precipitation)inasolutionofcellu-losenitrate.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thefollowingappliestoallspecifiedlimitsinthisstandard;forpurposesofdeterminingconformancewiththisstandard,anobservedvalueoracalculatedvalueshallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection6.1.5Forhazardinformationandguidance,seethesupplier’sMaterialSafetyDataSheet.2.ReferencedDocuments2.1ASTMStandards:2D301TestMethodsforSolubleCelluloseNitrate(With-drawn2011)3D841SpecificationforNitrationGradeTolueneD4615Specificationforn-ButylAcetate(AllGrades)E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1dilutionratio,n—themaximumnumberofunitvol-umesofadiluentthatcanbeaddedtoaunitvolumeofsolventtocausethefirstpersistentheterogeneity(precipitation)inthesolutionataconcentrationof8gcellulosenitrateper100mLofcombinedsolventplusdiluentandat...
