Designation:D1223–93(Reapproved1998)AnAmericanNationalStandardStandardTestMethodforSpecularGlossofPaperandPaperboardat75°1ThisstandardisissuedunderthefixeddesignationD1223;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisformeasuringthespecularglossofpaperat75°(15°fromtheplaneofpaper).1.2Althoughitschiefapplicationistocoatedpapers(1),2thistestmethodmayalsobeusedforuncoatedpapers.1.3Thistestmethodisnotameasureofimage-reflectingqualityandshouldnotbeusedforcast-coated,lacquered,highlyvarnished(2,3,4)orwaxedpapers(5),andhigh-glossinkfilms(6).Forthesepurposes,TAPPIT653“SpecularGlossofPaperandPaperboardat20Degrees”ispreferred,althoughthepresentmethodhasbeenshowntobesuitableforglossmeasurementsofmostotherinkfilmsonpaperorpaperboard.Here,differencesinthecolorandthediffusereflectancesoftheseinkfilmshaveanegligibleeffectonmeasuredgloss.Forexample,oncomparingwhiteandblacksurfaceswhichareotherwiseidentical,thewhitesurfacewillmeasurelessthanoneglossunithigherthantheblack.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D585PracticeforSamplingandAcceptingaSingleLotofPaper,Paperboard,Fiberboard,orRelatedProducts3D685PracticeofConditioningPaperandPaperProductsforTesting32.2TAPPIStandard:T1200Interlaboratoryevaluationoftestmethodstodeter-mineTAPPIrepeatabilityandreproducibility43.SignificanceandUse3.1Thistestmethodiswidelyusedasapartialmeasureofthesurfacequalityandshinyappearanceofcoatedpaper.4.Apparatus4.1GlossMeter—(seeFig.1).Itconsistsofasourceoflight,alensgivingaconvergingbeamofraysincidentonthetestspecimen,asucti...
