Designation:C385−58(Reapproved2014)StandardTestMethodforThermalShockResistanceofPorcelain-EnameledUtensils1ThisstandardisissuedunderthefixeddesignationC385;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheresis-tanceofporcelain-enameledutensilstothermalshock.Thistestmethodisadaptabletoanyporcelain-enamelutensilthatcanbefilledwithwatertoadepthof1in.(25mm).1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Apparatus2.1HotPlate,capableofmaintainingoveritsentiresurfaceauniformtemperature,thatis,lessthan20°F(−6.7°C)varia-tionovertheentiresurface.Surfacetemperatureofthehotplateshallbecapableofbeingadjustedfrom475to825610°F(245to44065.5°C).Thesurfacetemperatureofthehotplate,determinedbyanysuitablesurfacetemperaturemeasuringdevice,maybevariedbychangingthewattageinputtothehotplate.Ifthehotplatesurfacetemperaturebecalibratedtowattageinput,thedesiredtemperaturemaythenbesetbyadjustingwattageinput.Thewattageinputorsimilarcalibrationshallbemadeforeachsurfacetemperature(see6.2and6.3).2.2TimingDevice,aclockorsimilarinstrumenthavingasweepsecondhandandanintegratingminutehand.2.3Container,suitableforholdingapproximately4galofwater.2.4Container,forpouringwaterintoutensil.2.5Sponge,forwipingutensildry.3.QuenchingWater3.1Eithertapordistilledwatershallbeused.NOTE1—Inareaswheretapwaterisextremelyhard,distilledwaterisrecommended.4.TestSpecimens4.1Thetestspe...
