Designation:D5301−92(Reapproved2012)StandardPracticeforPhysicalCharacterizationofPaintBrushes1ThisstandardisissuedunderthefixeddesignationD5301;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthedimensions,terminology,ma-terialsandcharacteristicsgenerallyconsideredofimportancetothosewithin,ordealingwithpaintbrushes,anddescribesmethodsofdeterminingtheseparameters.Thispracticeisnotmeanttobeadefinitiveanalyticalmethodtodeformulatebrushes.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1chisel(orchiseled),n—adescriptionoftheconfigu-rationofthetipofthebrushasbeingofamoreorlessconvexshapeacrossthethicknessdimension.2.1.2flattip,n—adescriptionoftheconfigurationofthetipofthebrushasbeingflatorofuniformlengthacrossthethicknessdimension.2.1.3flagged,n—atermdescribingthetipofafilamentorbristleasbeingsplitresultinginamultiplicityoffilamentends.2.1.4tipped,n—atermdescribingthetipofafilamentorbristleascomingtoapoint.2.1.5microtome,n—adeviceforholdinganumberoffilamentorbristlematerialsinarigidstateforacrosssectionalexaminationunderamicroscope(seeFig.1).3.SignificanceandUse3.1Itisimportanttorecognizethatabrushcanbeamixtureofseveralchemicallydifferentfilamentsorbristles,orboth,inseveralcrosssections,thicknessesandlengths.Thefollowingprocedureswillbehelpfulinidentifyingbrushcomposition.4.DeterminationofHeadDimensions4.1Width—Determinethewidthbymeasuringthebrushingmaterialadjacenttotheferruleinthewideorbroaddimension,u...
