Designation:D2574−16StandardTestMethodforResistanceofEmulsionPaintsintheContainertoAttackbyMicroorganisms1ThisstandardisissuedunderthefixeddesignationD2574;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftherelativeresistanceofemulsionpaintstoattackinthecontainerbymicroorganisms.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D5588TestMethodforDeterminationoftheMicrobialConditionofPaint,PaintRawMaterials,andPlantAreas3.SummaryofTestMethod3.1Thistestmethodisdesignedtochallengesamplesofoneormorepaintscontainingvariouslevelsofoneormorebiocideswithaknownamountofbacteriaandratetheabilityofthetestpaint(s)tocontrolthe“contamination.”4.SignificanceandUse4.1Spoilageofpaintinthecontainercanresultinputrefaction,loweredpH,gasformation,anddecreaseinviscosity.Thistestmethodprovidesastandardprocedurefortheevaluationoftheresistanceofemulsionpaintstomicrobialdeterioration.Theresultsshouldenable:(1)thepaintmanu-facturertoselectaneffectivepreservativeand(2)thesupplierofpreservativestoevaluatetheperformanceinemulsionpaintsofcompetitiveanddevelopmentalpreservatives.4.2Thistestmethodshouldbeusedpreferablybypersonswhohavehadbasicmicrobiologicaltraining.NOTE1—Thereliabilityoftheresultsobtainedfromthistestmethodisextremelydependentonthetechniquesemployed.Impropertechniquescanresultinasterilesampleappearingtobecontaminated,andevenworse,acontaminatedsampleappearingtobesterile(seealsoNote2).Itisrecomme...
