Designation:F995−09StandardPracticeforEstimatingTonerUsageinCopiersUtilizingDryTwo-ComponentDeveloper1ThisstandardisissuedunderthefixeddesignationF995;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribesaprocedureforestimatingthenumberofcopiesthatcanbeproducedforagivenunitoftonerinacopierusingdrytwo-componentdeveloper.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.SeeSection9forspecificprecautionarystatements.2.ReferencedDocuments2.1ASTMStandards:2F335TerminologyRelatingtoElectrostaticImagingF875TestMethodforEvaluationofLargeAreaDensityandBackgroundonOfficeCopiers2.2ASTMAdjuncts:KCharts33.Terminology3.1DescriptionsofTermsSpecifictothisStandard:3.1.1tonerusage—amountoftoner(milligramspercopy)removedfromthetonerreservoirduringthecopyingprocess.3.1.2two-componentdeveloper—amixtureofdrytonerandcarrierusedfordevelopingelectrostaticimagesincopiers(SeeTerminologyF335.)4.SummaryofPractice4.1Acopierissetuptostandardoperatingparametersandoperatedunderacontrolledjobstreamandenvironmentforalengthoftimesufficientforstableperformance.Aknown,orestimated,quantityoftonerisusedtoreplenishthedeveloperoverthelengthofthetestandthisresult,alongwiththetotalnumberofcopiesgenerated,isusedtoestimatethenumberofcopiesproducedperunitoftoner.5.SignificanceandUse5.1Thispracticemaybeusedtoevaluatetheperformanceofdifferenttonersinacommonmachine.Itcanalsobeusedtoevaluatetheeconomicsoftonerusagewhenmakingmachine-to-machinecomparisons.5.2Thepracticeprovidesonl...
