Designation:D4705−18StandardTestMethodforStitchTearStrengthofLeather,DoubleHole1ThisstandardisissuedunderthefixeddesignationD4705;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodisintendedforuseindeterminingthestitchtearingresistanceofleatherusingadoubleholetear.Itisparticularlyapplicabletolightweightleathers.Thistestmethoddoesnotapplytowetblue.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1610PracticeforConditioningLeatherandLeatherProd-uctsforTestingD1813TestMethodforMeasuringThicknessofLeatherTestSpecimensD2209TestMethodforTensileStrengthofLeatherD2813PracticeforSamplingLeatherforPhysicalandChemicalTests3.SignificanceandUse3.1Thistestmethodisdesignedtomeasuretheloadrequiredtotearleatherthroughtwoholesinthetestspecimen.Tannersandleatherbuyershavefoundthatthistestgivesanindicationoftheresistanceofleathertotearing.Itisofparticularvalueinestimatingthedurabilityofleathertowithstandtearingstressesencounteredinthemanufactureofshoes,garments,andupholsteredproduc...
