Designation:D1485−07(Reapproved2015)StandardPracticeforRubberfromNaturalSources—SamplingandSamplePreparation1ThisstandardisissuedunderthefixeddesignationD1485;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispractice,intendedforrefereepurposes,coversauniformprocedureforsamplinglotsofsolidnaturalrubber.Naturalrubbergenerallyismarketedinbalesorpackagesofvarioussizes.1.2Aprocedurefordeterminingtheacceptabilityoflotsofnaturalrubberisgiven.Thisprocedureisbasedonavariablesamplingplan.1.3Thesamplesizeisbasedontheassumptionofavisuallyhomogeneousmaterial.Ifobviousheterogeneityexists,thenumberofsamplesshallbeincreased.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1278TestMethodsforRubberfromNaturalSources—ChemicalAnalysisD3182PracticeforRubber—Materials,Equipment,andPro-ceduresforMixingStandardCompoundsandPreparingStandardVulcanizedSheetsD3184PracticeforRubber—EvaluationofNR(NaturalRubber)2.2ANSIStandard:Z1.9SamplingProceduresandTablesforInspectionbyVariablesforPercentDefective33.SignificanceandUse3.1Thispracticeoutlinesaprocedureforsamplingandsamplepreparationofnaturalrubber.Astatisticalmethodfordeterminingaqualityindexandlotacceptabilityisgiven.Thesamplingplanisoptionalforqualitycontrolorproduction,butmaybeusedwhenneededforrefereepurposes.4.Sampling4.1SampleSize—ThenumberofsamplestobeselectedtorepresentthelotshallbedeterminedbythesizeofthelotasindicatedinTable1.Asamplebaleisselectedrandomlyfromthelotforeachsampler...
