Designation:C283−13(Reapproved2017)StandardTestMethodsforResistanceofPorcelainEnameledUtensilstoBoilingAcid1ThisstandardisissuedunderthefixeddesignationC283;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThedescribedmethodfurnishesameansofquantitativelytestingandgradingglossyporcelainenamelswithrespecttotheirresistancetoboilingcitricacidatroomtemperature.Citricacidhasbeenselectedbecauseitisthemostcommonandoneofthemoresevereofthefoodacidsinitsactiononconventionalporcelainenamels.1.Scope1.1Thesetestmethodscoverthedeterminationoftheresistanceofporcelainenamelcoatingsusedonutensilstoattackbyboilingacid.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.SignificanceandUse2.1TestMethodAprovidestheproducersofporcelainenameledutensilswithaqualitycontrolmethodoftestingforresistancetoboilingacidforpartsrandomlyselectedfromtheproductionline.2.2TestMethodBprovidesthesupplierofporcelainenamelrawmaterialswithalaboratorymethodfortestingtheresistanceofdifferentcoatings(intendedforuseonutensils)toboilingacid.TESTMETHODA3.Apparatus3.1HotPlate,capableofmaintainingoveritsentiresurfaceauniformtemperaturethatwillkeep...
