Designation:D5068−04(Reapproved2013)StandardPracticeforPreparationofPaintBrushesforEvaluation1ThisstandardisissuedunderthefixeddesignationD5068;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribesthepreparationofpaintbrushesforevaluation.1.2Thispracticeisapplicabletopaintbrushes50to100mm(2to4in.)inwidth.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D3924SpecificationforEnvironmentforConditioningandTestingPaint,Varnish,Lacquer,andRelatedMaterialsD5301PracticeforPhysicalCharacterizationofPaintBrushes3.SummaryofPractice3.1Usingapaintchosenfortheevaluation,thebrushtobetestedisrepeatedlyloadedwithpaintandbrushedoveraspecifiedareainaspecifiedapplicationtime.4.SignificanceandUse4.1Untilthepaintbrushisfullyconditionedandwettedwithpaint,onlypartofthepaintloadedontothebrushcanbetransferredtothesurfacebeingpainted.Byproperlypreparingthebrushbeforeuse,theamountofpaintdeliveredtothesurfacecanbemademoreuniformandreflectrealuse.5.Apparatus5.1Container,toholdpaint,forexample,aquartcan.5.2TestBrush,50to100mm(2to4in.)inwidth.5.3Balance,toweighbrushtothenearest0.1gram.6.Materials6.1TestPaint.6.2Brush-OutPanels,orothertypicalpanelstobeused.36.3MaskingTape,tosecurethepaneltoaflatsurface.7.Procedure7.1Alltestsaretobeconductedinanatmospherehavingatemperatureof2362°C(73.563.5°F)andarelativehumidityof5065%(seeSpecificationD3924).7.2Recordweightofthetestbrushbeforeloading(W1)usingtheexampleformatasaguide(seeTable1).Placebrushou...
