Designation:D3891−08(Reapproved2019)StandardPracticeforPreparationofGlassPanelsforTestingPaint,Varnish,Lacquer,andRelatedProducts1ThisstandardisissuedunderthefixeddesignationD3891;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthepreparationofglasspanelsforsubsequenttestingofpaint,varnish,lacquer,andrelatedproducts.21.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1152SpecificationforMethanol(MethylAlcohol)D1193SpecificationforReagentWater3.SignificanceandUse3.1Theproceduresdescribedinthispracticearedesignedtoprovideuniformglasspanelsfortestingofpaint,varnish,lacquer,conversioncoatingsandrelatedproducts.4.ReagentsandMaterials4.1PurityofWater—Unlessotherwiseindicated,referencestowatershallbeunderstoodtomeanreagentwaterconformingtoTypeIVofSpecificationD1193.4.2Solvents—VarnishMakers’andPainters(VM&P)naphtha,xylene,2-methoxypropanol,andmethanolcomplyingwiththeappropriatespecifications(seeSpecificationD1152).4.3Glassofthefollowingtypesmaybespecifiedintheapplicabletestmethods:4.3.1WindowGlass,(floatglass)thesurfaceofwhichisplainandfreeofirregularities.NOTE1—Floatglassisthemostcommonkindofglassusedforwind...
