Designation:D3472−97(Reapproved2007)StandardTestMethodforReverse-RatchetTorqueofTypeIAChild-ResistantClosures1ThisstandardisissuedunderthefixeddesignationD3472;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoversthemeasurementofthetorquedevelopedwhenTypeIAchild-resistantclosuresarerotatedinthecounter-clockwisedirection.TypeIAclosuresarereclos-ablecontinuousthreadedclosuresthatusearandompushdownwhileturning;noorientationofthepushdownforceisnecessary.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D3198TestMethodforApplicationandRemovalTorqueofThreadedorLug-StyleClosuresD3474PracticeforCalibrationandUseofTorqueMetersUsedinPackagingApplicationsD3475ClassificationofChild-ResistantPackagesD3810TestMethodforMinimumApplicationTorqueofTypeIAChild-ResistantClosuresE105PracticeforProbabilitySamplingofMaterialsE122PracticeforCalculatingSampleSizetoEstimate,WithSpecifiedPrecision,theAverageforaCharacteristicofaLotorProcess3.Terminology3.1Definition(seeClassificationD3475).3.1.1TypeIAchild-resistantclosure—atwo-piececontinu-ousthreadclosurerequiringarandompushdownwhileturning;noorientationofthepushdownforceisnecessary.4.SummaryofTestMethod4.1Representativespecimensofchild-resistantthreadedclosuresareappliedtoanappropriatecontainer.Atorque-measuringdeviceisusedtomeasuretheamountoftorquedevelopedwhentheclosureisrotatedinthecounter-clockwisedirectionwithoutanyverticalforceapplied.Thisisreverse-ratchettorque.5.SignificanceandUse5.1Thesetorquemeasurementsareofvaluebecausethereverse-ratchettorqueisatorqueappliedtotheclos...
