Designation:D1725−12StandardPracticeforPreparingResinSolutionsforViscosityMeasurementbyBubbleTimeMethod1ThisstandardisissuedunderthefixeddesignationD1725;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeprovidesinstructionsforpreparingresinsolutionsviscositymeasurementbybubbletimemethod.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.2.ReferencedDocuments2.1ASTMStandards:2D154GuideforTestingVarnishesD1545TestMethodforViscosityofTransparentLiquidsbyBubbleTimeMethodD6440TerminologyRelatingtoHydrocarbonResinsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod2.2OtherDocument:OSHARegulations,29CFR,paragraphs19.10.1000and1910.120033.Terminology3.1FordefinitionsrelatedtohydrocarbonresinsseeTermi-nologyD6440.4.SummaryofPractice4.1Solidresinsaredissolvedinorganicsolventsbycold-cutorhot-cutmethodsinthelaboratory.Theviscosityofsuchpreparedsolutions,orofcommercialsolutionsofresinsisthendeterminedbythebubbletimemethod(TestMethodD1545).Thebubblesecondsareapproximatelyequaltostokes.5.Apparatus5.1Bath,constant-temperature,consistingofacylindricalglassjarofabout5-galcapacity,oranaquariumtankwithcontrolscapableofmaintainingthetemperatureat2560.1°Cwithwaterasthebathmedium.5.2Bottles,225-mL(8-oz),wide-mouth,screwcap.5.3Cellophane,sheet,cutinto102or127-mm(4or5-in.)squares.5.4Corks,No.2shorttaper,tofitviscositytubes.5.5HolderforViscosityTubes,preferablyamechanicalholder4withrackandpinionforin...
