Designation:D5166−97(Reapproved2016)StandardPracticeforLaboratoryPreparationofGelledVehicleSamplesUsingaMicrowaveOven1ThisstandardisissuedunderthefixeddesignationD5166;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeoutlinesaprocedureforpreparinggelledvehiclesamplesusingamicrowaveoven.1.2Thetestsamplescanbeusedforcharacterizingthegelabilityorreactivityofresins,gellingagents,andvehiclesusedinthemanufactureofoilbasedprintinginks,orboth.1.3Evaluationofthegelledvehiclesmay,dependinguponpreference,beeithervisualorinstrumental.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D154GuideforTestingVarnishesD1545TestMethodforViscosityofTransparentLiquidsbyBubbleTimeMethodD1725PracticeforPreparingResinSolutionsforViscosityMeasurementbyBubbleTimeMethodD4040TestMethodforRheologicalPropertiesofPastePrintingandVehiclesbytheFalling-RodViscometerE1SpecificationforASTMLiquid-in-GlassThermometers3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1gel,n—Anyresinsolution,ormorecomplexblendofresinsandalkydsthathasbeencookedorreactedwithagellingorcross-linkingagenttobuildmolecularweightandthatexhibitsapseudoplasticrheology.(Alsocalled“gelledve-hicle.”)3.1.2gellingagent,n—inthecontextofinkresinsandvehicles,gellingagentsorgellantsaretypicallyorgano-aluminumcompoundsthatreactwithcarboxylicacidandhydroxylgroupspresentonthebackboneofresinsandalkydstoformcross-linkednetworks.(Alsocalled“gellant.”)3.1.3gellength,n—Refer...
