Designation:D772−18StandardTestMethodforEvaluatingDegreeofFlaking(Scaling)ofExteriorPaints1ThisstandardisissuedunderthefixeddesignationD772;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoverstheevaluationofthedegreeofflaking(scaling)ofexteriorpaintsbycomparisonwithphoto-graphicstandards.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3ThistestmethodissimilarthoughnotidenticaltoISO4628Part5.ISO4628Part5usesa0to5ratingscale,wherearatingof0isnochangeandaratingof5ismostsevere.TestMethodD772usesa10to0ratingscale,wherearatingof10isnochangeandaratingof0ismostsevere.Thetwostandardsusedifferentpictorialreferencephotographsfordeterminingtheratingvalues.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1OtherStandards:2ISO4628Part5—PaintsandVarnishes—EvaluatingtheDegradationofCoatings—DesignationofQuantityandSizeofDefects,andofIntensityofUniformChangesinAppearance—Part5:AssessmentofDegreeofFlaking3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1flaking,n—thatphenomenonmanifestedinpaintfilmsbytheactualdetachmentofpiecesofthefilmitselfeitherfromitssubstrateorfrompaintpreviouslyapplied.Inthis...
