Designation:D1076−15StandardSpecificationforRubber—Concentrated,AmmoniaPreserved,Creamed,andCentrifugedNaturalLatex1ThisstandardisissuedunderthefixeddesignationD1076;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversrequirementsforfirstgradeconcentratednaturalrubberlatex(seeTable1)ofthefollowingcategories:Category1—CentrifugedHeveanaturallatexpreservedwithammoniaonlyorbyformaldehydefollowedbyammonia.Category2—CreamedHeveanaturallatexpreservedwithammoniaonlyorbyformaldehydefollowedbyammonia.Category3—CentrifugedHeveanaturallatexpreservedwithlowammoniawithothernecessarypreservatives.Category4—Centrifuged,orcentrifugedandcreamed,gu-ayulelatex,orothernaturalrubberlatex,containinglessthan200µgtotalproteinpergramdryweightoflatex,withammoniaorotherhydroxide,withothernecessarypreserva-tivesandstabilizers.Category5—CentrifugedHeveanaturallatextreatedwithaluminumhydroxideorbyothermeans,preservedwitham-moniaonlyorbyformaldehydefollowedbyammoniacontain-inglessthan0.5%non-rubbercontent.1.2Thisspecificationisnotnecessarilyapplicabletolaticespreparedorpreservedbyothermethods,andshallnotbeconstruedaslimitingthedesirabilityorusefulnessofothercategoriesoflatices.ItdoesapplytonaturallatexsourcesotherthanHeveabrasiliensisbutdoesnotapplytocompoundedlatexconcentrates.1.3Theanalyticalproceduresapplicabletothespecifica-tionsareincludedandappearinthefollowingorder:SectionSampling6and7TotalSolids8DryRubberContent9ProteinContent10TotalAlkalinity11Viscosity12SludgeContent13CoagulumContent14KOHNumber15pH16MechanicalStability17CopperandManganese18Density19–31VolatileFattyAcids32–36BoricAcid37DryFilms38PrecisionforAllTestMethods391.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDoc...
