Designation:F1598−95(Reapproved2014)StandardTestMethodforDeterminingtheEffectsofChemical/SolventExposuretoaMembraneSwitch/GraphicOverlay(SpotTestMethod)1ThisstandardisissuedunderthefixeddesignationF1598;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthetestingofanysurfacethatmaybeexposedtoliquidchemical(s).1.2Thistestmethodisnotdesignedforimmersiontestingconditionsormaterialedgeattack.1.3Thistestmethodisdesignedforevaluationofvisualchanges.Incertaininstancesphysical(non-visual)changesmayoccurandfunctionaltestingmaybeappropriate.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2F1595PracticeforViewingConditionsforVisualInspectionofMembraneSwitches3.SignificanceandUse3.1Thespecificchemical(s)selectedisatthediscretionofthecustomerandvendor.3.2Variationsinresultsmaybeexpectedduetodifferentratesofchemicalevaporation.Theuseofawatchglasswithsealededgesisintendedtocurtailoreliminateevaporationofthechemical.4.Apparatus4.1Watchglass,1.5in.(38mm).4.2Medicalgauzepad,0.75in.2(19mm2),60.125in.(3mm).5.Conditioning5.1Conditionallspecimensandchemical(s)/solvent(s)for72hat68to77°F(20to25°C)and20to80%relativehumidity(RH).5.2Thetestspecimenshouldbecleananddrybeforetesting.5.3CleaningoftheTestSpecimen:5.3.1Useacleanlint-freepieceofabsorbentmaterialandeitherreagentgradesofn-heptaneorisopropylalcohol.5.3.2Wipethesurfaceofthetestareawithasat...
