Designation:D4907−10(Reapproved2020)StandardTestMethodforNitrocelluloseinFinishonLeather1ThisstandardisissuedunderthefixeddesignationD4907;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedforuseinidentifyingnitrocelluloseinthefinishonalltypesofleathers.Thistestmethoddoesnotapplytowetblue.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.SignificanceandUse2.1Thistestmethodisusedtoidentifynitrocelluloseinfinishesonalltypesofleathers.3.Apparatus3.1BorosilicateGlassWatchGlass,100mmdiameter.3.2ReagentBottles,two,(4flozeach)equippedwithglassjointdroppingpipet.4.Reagents4.1Indicatorsolutionpreparedbydissolving0.1gdiphe-nylamineinsolutioncontaining100mLofsulfuricacidand30mLofdistilledwater.4.2Blanksolutioncomprising100mLofsulfuricacidand30mLofdistilledwater.4.3Acetone,C.P.4.4HazardsStatement—Allreagentsandchemicalsshouldbehandledwithcare.Beforeusinganychemical,readandfollowallsafetyprecautionsandinstructionsonthemanufac-turer’slabelorMSDS(MaterialSafetyDataSheet).5.TestSpecimen5.1Thetestspecimenshallbeapproximately1cm2ofthefinishedleather.6.Procedure6.1Placethetestspecimeninthewatchglasswiththefinishsideup.Applyoneor2mLofindicatorsolutiononthef...
