Designation:D4826–88(Reapproved2007)AnAmericanNationalStandardStandardPracticeforUnitsofMeasurementandConversionFactorsforPulp,Paper,andPaperboard1ThisstandardisissuedunderthefixeddesignationD4826;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticecoverstheapplicationoftheInternationalSystemofUnits(abbreviatedSI)withinthefieldofpulp,paper,andpaperboard.TheSIunitshavebeenadoptedbyISO,ASTM,andTAPPIasthepreferredunitsforuseintheirstandardsandtestmethods.1.2DetailsofSIaregiveninvariouspartsofISOStan-dards31and1000,andinASTMPracticeIEEE/ASTMSI10.Applicationofthisinformationisnotalwayseasy,assomepropertiescannotatthistimebeexpressedinSI,somecanbeexpressedinvariousunitsallwithinSI,andvariousmultiplescanbeused.Suchvariationcanleadtoconfusioninreportingtestresultsandinquotingvaluesforproperties.1.3Inordertoovercomesuchproblemswithinthepulp,paper,andpaperboardfield,ISO/TC6hasrecommendedap-propriateunitsinISOStandard5651.Theserecommendationsarereproducedinthispractice,togetherwithotherinformationandrecommendations.2.ReferencedDocuments22.1ASTMStandards:IEEE/ASTMSI10AmericanNationalStandardforUseoftheInternationalSystemofUnits(SI):TheModernMetricSystem3,42.2ISOStandards:ISO31Quantities,UnitsandSymbols,Parts0–134ISO1000SIUnitsandRecommendationsfortheUseofTheirMultiplesandofCertainOtherUnits43.SummaryofPractice3.1Thispracticecoverstheunitsrecommendedforuseinexpressingthepropertiesofpulp,paper,andpaperboardandotherquantitiesfoundinthepulp,paper,andpaperboarddocuments.Italsoprovidestheconversionfactorsforconvert-ingcustomaryunitstometricunitsorotherrecommendedunits,andmarkswithanasterisk(*)whentheconversionfactorisexact.3.2UnitsrecommendedinISO5651aremarked(+)or(#),withthelatterindicatingthattherecommendedunitforpulp,paper,andpaperboardisnotapreferredSI...
