Designation:D279−02(Reapproved2012)StandardTestMethodsforBleedingofPigments1ThisstandardisissuedunderthefixeddesignationD279;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thesetestmethodscoverproceduresfordeterminingthebleedingcharacteristicsofdrypigmentsbydirectsolventextractionofthepigmentandbyoverstripingafilmwithawhitecoatingandobservingforthecolormigrationfromthebasecoatcontainingthepigment.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2244PracticeforCalculationofColorTolerancesandColorDifferencesfromInstrumentallyMeasuredColorCoordinatesD2616TestMethodforEvaluationofVisualColorDiffer-enceWithaGrayScale3.SummaryofTestMethods3.1TestMethodA—Thepigmentisshakenwithtoluene,filtered,andthefiltrateobservedforcolor.3.2TestMethodB—Acoatingusingthepigmentundertestispreparedandappliedtoonehalfofapanel.Awhitefinishisappliedoverthedriedcoloredcoatingandextendedtotheuncoatedportionofthepanel.Thedriedoverstripecoatingisexaminedforcolormigrationfromthebasecoat.4.SignificanceandUse4.1TestMethodAdeterminestheamountofcolorproducedwhenthepigmentisindirectcontactwithaselectedsolventsuchastoluene.Itisusefulasarapid,easilyconductedtestofthegeneralbleedingcharacteristicsofpigments.4.2TestMethodBdeterminestheamountofcolormigra-tionintoawhitefilmappliedoverabasecoatcontainingthepigment.Itmaygiveamorepracticalevaluationofwhetherapigmentwillmeetspecificrequirements...
