Designation:D823−18(Reapproved2022)StandardPracticesforProducingFilmsofUniformThicknessofPaint,CoatingsandRelatedProductsonTestPanels1ThisstandardisissuedunderthefixeddesignationD823;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Fivepracticesaregivenforpreparingfilmsofuniformthicknessofcoatingsontestpanels.Thesepracticesare:PracticeA—AutomatedSprayMachineApplicationPracticeB—Motor-DrivenDipCoaterApplicationPracticeC—Motor-DrivenBladeFilmApplicationPracticeD—Hand-HeldSprayGunApplicationPracticeE—Hand-HeldBladeFilmApplication1.2Theuseofwire-wounddrawdownbarsasdescribedinPracticeD4147mayalsobeanappropriatemethodforproducingfilmsofuniformcoatingthickness.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D609PracticeforPreparationofCold-RolledSteelPanelsforTestingPaint,Varnish,ConversionCoatings,andRelatedCoatingProductsD1005TestMethodforMeasurementofDry-FilmThick-nessofOrganicCoatingsUsingMicrometersD1212TestMethodsforMeasurementofWetFilmThick-nessofOrganicCoatingsD3924SpecificationforStandardEnvironmentforCondi-tioningandTestingPaint,Varnish,Lacquer...
