Designation:C375−58(Reapproved2016)StandardClassificationofWaterUsedinMillingofPorcelainEnamel1ThisstandardisissuedunderthefixeddesignationC375;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisstandardsetsforthClassA,B,andCcategoriesforwaterusedformillingporcelainenamelbasedontheconcentrationsofallowablecontaminatesandthequalityrequirementsofthefiredfinish.1.Scope1.1Thisclassificationcoverswaterusedinthemillingofporcelainenamelfrit.2.ReferencedDocuments2.1ASTMStandards:2D511TestMethodsforCalciumandMagnesiumInWaterD512TestMethodsforChlorideIonInWaterD513TestMethodsforTotalandDissolvedCarbonDioxideinWaterD516TestMethodforSulfateIoninWaterD858TestMethodsforManganeseinWaterD1068TestMethodsforIroninWaterD1126TestMethodforHardnessinWaterD1293TestMethodsforpHofWaterD1888MethodsOfTestforParticulateandDissolvedMatterinWater(Withdrawn1989)3D3370PracticesforSamplingWaterfromClosedConduits3.Classification3.1Threeclassesofwaterarecovered,basedonthemaximumimpurityanalysesasdefinedinTable1.Forporce-lainenamelfrits,ClassAwatershouldcausenodifficultiesintheproductionofahighqualityfinish.ClassBwatermaybeusedbyslightcompensationsinprocessing.MilladditionwaterfallingintoClassCshouldbetreatedbeforeuseinordertoprecludefaultyenamelproduction.4.MethodsofAnalysis4.1DeterminetheelementsandpropertieslistedinTable1inaccordancewiththefollowingASTMmethods:4.1.1Sampling—PracticeD3370.4.1.2Bicarbonate—TestMethodD513.4.1.3CalciumandMagnesium—TestMethodD511.4.1.4Chloride—TestMethodD512.4.1.5Hardness—TestMethodD1126.4.1.6Iron—TestMethodD1068.4.1.7Manganese—TestMethodD858.4.1.8pH—TestMethodD1293.4.1.9Sulfate—TestMethodD516.4.1.10TotalSolids—TestMethodD1888.1ThisclassificationisunderthejurisdictionofASTMCommitteeB08onMetallicandInorganicCoatingsandisthedirectresponsibi...
