Designation:D5342–97(Reapproved2007)AnAmericanNationalStandardStandardTestMethodforResistancetoBendingofPaperandPaperboard(Taber-TypeTesterinBasicConfiguration)1ThisstandardisissuedunderthefixeddesignationD5342;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedureusedtomeasuretheresistancetobendingofpaperandpaperboard.1.2Thebendingmomentrequiredtodeflectthefreeendofa38-mm(1.5-in.)wideverticallyclampedspecimen15°fromitscenterlinewhentheloadisapplied50mm(1.97in.)awayfromtheclampisdetermined.Theresistancetobendingiscalculatedfromthebendingmoment.1.3Someinstrumentsofthetypedescribedinthistestmethod(seeSection6)maybeequippedwithultrasensitiveattachmentsormaybemodifiedtoaccommodateshorterspecimenlengthsthanthatspecifiedinthistestmethod(seeSection9).1.4TestMethodD5650describesamodificationoftheinstrumentdescribedinthistestmethodformeasurementsinthe0to10Taberstiffnessrangeonly,andwhichrequiresasmallertestspecimen.Themodifiedproceduremayberecom-mendedforpaperswhicharelowingrammageorhighlyflexible,orboth.1.5TestresultsobtainedusingmodificationsofthebasicTaber-typeinstrumentsuchasthatdescribedinTestMethodD5650havebeenreportedtobeasmuchas40%differentfromthoseobtainedusingthistestmethod,andsuchmodifi-cationsmustnotbeusedwhenthistestmethodisspecified.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D585PracticeforSamplingandAcceptingaSingleLotofPaper,Paperboard,Fiberboard,andRelatedProductD685PracticeforConditioningPaperandPaperProductsforTestingD1968TerminologyRelatingtoPaperandPaperProductsD5650TestMethodf...
