Designation:D2372−85(Reapproved2015)StandardPracticeforSeparationofVehicleFromSolvent-ReduciblePaints1ThisstandardisissuedunderthefixeddesignationD2372;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thispracticecoverstheprocedurefortheseparationofthevehiclefromthepigmentinsolvent-reduciblepaint.1.2Inthedevelopmentofthepracticethefollowingmate-rialsweretested:whitesoyaandwhitefishoilisophthalicalkydsemi-glossenamels,whitelinseedoilpaint,whitesoyaandwhitelinseedo-phthalicalkydenamels.Itisconsideredtobeapplicabletosimilarmaterials.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2371TestMethodforPigmentContentofSolvent-ReduciblePaintsD2698TestMethodforDeterminationofthePigmentCon-tentofSolvent-ReduciblePaintsbyHigh-SpeedCentri-fuging3.SignificanceandUse3.1Separationofthevehiclefromthepigmentinsolvent-reduciblepaintsisrequiredinordertocharacterizepaintvehiclesbychemical,spectroscopic,orchromatographictech-niques.Characterizationofvehiclesisimportantsincetheyplayamajorroleintheperformanceofcoatings.4.Apparatus4.1Centrifuge,high-speed,capableofdevelopinginexcessof10000g.NOTE1—Calculatethegravitydevelopedbythecentrifugeasfollows:g51.118310263r3n2(1)where:r=rotatingradius,mm,andn=rotatingspeed,r/min.5.ProcedureNOTE2—Ifthepercentofpigmentisdesired,seeTestMethodD2371andTestMethodD2698.5.1Mixthesampleuntilitishomogeneous,preferablyonamechanicalshaker.5.2...
