Designation:D5724−16(Reapproved2021)StandardSpecificationforGouachePaints1ThisstandardisissuedunderthefixeddesignationD5724;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationestablishesrequirementsforcomposition,physicalproperties,performance,andlabelingofgouachepaints.1.2Thisspecificationcoverspigments,vehicles,andaddi-tives.Requirementsareincludedforpigmentidentification,lightfastness,andconsistency.1.3Table1listssomepigmentsmeetingthelightfastnessrequirementsinthisspecification.Inordertoidentifyotherpigmentsthatmeettheserequirements,instructionsaregivenfortestspecimenpreparation.Testmethodsfordeterminingrelativelightfastnessarereferenced.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D185TestMethodsforCoarseParticlesinPigmentsD279TestMethodsforBleedingofPigmentsD476ClassificationforDryPigmentaryTitaniumDioxideProductsD823PracticesforProducingFilmsofUniformThicknessofPaint,CoatingsandRelatedProductsonTestPanelsD1210TestMethodforFinenessofDispersionofPigment-VehicleSystemsbyHegman-TypeGageD1535PracticeforSpecifyingColorbytheMunsellSystemD4236PracticeforLabelingArtMaterialsforChronicHealthHazardsD4303TestMethodsforLightfastnessofColorantsUsedinArtists’MaterialsE284TerminologyofAppearance2.2OtherDocuments:ColourIndex33.Terminology3.1Definitions:3.1.1colourindexname,n—consistsofthecategory(typeofdyeorpigment),generalhue,andanassignednumbergiventoacolorantint...
