Designation:D2486−06(Reapproved2012)´1StandardTestMethodsforScrubResistanceofWallPaints1ThisstandardisissuedunderthefixeddesignationD2486;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—Footnotesin6.3.1wereeditoriallyupdatedinFebruary2012.1.Scope1.1Thesetestmethodscoveraprocedurefordeterminingtheresistanceofwallpaintstoerosioncausedbyscrubbing,referredtohereinafteras“scrubresistance.”1.2Twotestmethodsarecoveredasfollows:1.2.1TestMethodA—Cycles-to-failureobtainedontestpaint.1.2.2TestMethodB—Ratioexpressedasapercentageofcycles-to-failureobtainedonthetestpainttothatobtainedonaconcurrentrunwithaknownreferencepaint.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D3924SpecificationforEnvironmentforConditioningandTestingPaint,Varnish,Lacquer,andRelatedMaterialsD4213TestMethodforScrubResistanceofPaintsbyAbrasionWeightLoss3.SummaryofTestMethod3.1InTestMethodA,thetestpaintisappliedtoablackplasticpanel.Aftercuring,thecoatedpanelisplacedovera12.7wideby0.25-mmthick(1⁄2-in.by10-mil)shimandheldinplaceonadrawdownplateinawashabilitymachinebymeansofagasketedframe.Thecoatedpanelisthenscrubbedwithabristlebrushandanabrasivescrubmediumuntilthepaintfilmisremovedinonecontinuousthinlineacrosstheshim.3.2InTestMethodB,thetestpaintandareferencepaintareappliedsimultaneouslyperpendiculartothelengthoftheblackplasticpanel.Aftercuring,thecoatedpanelisplacedovertwo12.7by0.2...
