Designation:D6688−11StandardPracticeforRelativeResistanceofPrintedMattertoLiquidChemicalsbyaSandwichTechnique1ThisstandardisissuedunderthefixeddesignationD6688;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticecoverstheevaluationoftherelativeresistanceofprintedmattertoliquidchemicals,asevidencedbylackofdiscoloration,bleeding,orlossofgloss.1.2ThispracticeutilizesasandwichproceduresimilarinprincipletoISO/TC130N589.SpottingorimmersionproceduresarecoveredinTestMethodsD1308,D1647,andD2248.1.3Thispracticeisapplicabletoprintsonanyflatsubstrateincludingpaper,paperboard,metallicfoil,metalplate,andplasticfilms,andproducedbyanyprintingprocessincludingletterpress,offsetlithography,flexography,gravure,silkscreen,andnon-impact.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.2.ReferencedDocuments2.1ASTMStandards:2D1308TestMethodforEffectofHouseholdChemicalsonClearandPigmentedOrganicFinishesD1647TestMethodsforResistanceofDriedFilmsofVarnishestoWaterandAlkali(Withdrawn2004)3D2248PracticeforDetergentResistanceofOrganicFinishes2.2OtherStandards:ISO/TC130N589GraphicTechnology-PrintsandPrintingInks-AssessmentofResistancetoVariousAgents43.SummaryofPractice3.1Printsofthetestandreferenceprintinginksareeachsandwichedbetweenfilterpaper,whichhasbeensaturatedwiththespecifiedliquid.Aftertheagreeduponcontacttimes,theprintsandfilterpaperaredriedandthenexaminedforobjectionablechangessuchasdiscoloration,bleeding,orlossingloss.Thetestprin...
