Designation:D919–97(Reapproved2002)TechnicalAssociationofPulpandPaperIndustryStandardMethodT430m-52AnAmericanNationalStandardStandardTestMethodforCopperNumberofPaperandPaperboard1ThisstandardisissuedunderthefixeddesignationD919;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethod(1,2,3,and4)2coversthedetermi-nationofthecoppernumberofbleachedandpurifiedpaperandpaperboard,exceptthosecontainingcalciumsulfite,zincsulfide,melamineresin,urea-formaldehyderesin,starch,rosinsize,orothercopper-reducingnonfibrousmaterials.Papercontainingsuchadditivescanbetestedonlyiftheamountandreducingpoweroftheaddedmaterialisknown.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D585PracticeforSamplingandAcceptingaSingleLotofPaper,Paperboard,Fiberboard,orRelatedProducts3D586TestMethodforAshinPulp,Paper,andPaperProducts3D644TestMethodforMoistureContentofPaperandPaperboardbyOvenDrying3D687MethodforQuantitativeDeterminationofCoatingonMineralCoatedPaper4D1968TerminologyRelatingtoPaperandPaperProducts33.Terminology3.1Definition:DefinitionsshallbeinaccordancewithTerminologyD1968andtheDictionaryofPaper.54.SignificanceandUse4.1Thecoppernumbercanberegardedasanindexofthoseimpuritiesincellulosesuchasoxycellulose,hydrocellulose,lignin,andsugarswhichpossessreducingproperties.Itisvaluablefordetectingchangesaccompanyingdeteriorationandmay,therefore,beconsideredasatestforindicatingthepermanenceofpaper.Inparchmentandgrease-proofpapers,coppernumberisconsideredtogiveanindicationofthedegreeofparchmentizing.5.Apparatus5.1Grinder—Agrinderthatwillcompletelydi...
