Designation:D4009−92(Reapproved2011)StandardGuideforFoamStabilityofHandDishwashingDetergents1ThisstandardisissuedunderthefixeddesignationD4009;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguideprovidesguidelinesforseveraltechniquesofmeasuringthefoamstabilityoflight-dutyhanddishwashingdetergentproductsinthepresenceofartificiallyappliedtest-foodsoils.Itisintendedasalaboratoryscreeningtesttoaidintheformulationofproducts,forqualitycontrolandasabasisbetweentheformulatorandsupplierinstandardizingspecificproducts’performance.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SummaryofGuide2.1Soileddinnerplatesarewashedbyhandinsolutionsofhanddishwashingdetergentsunderstandardizedconditionsuntilanendpointofnear-disappearanceofthefoamisreached,afterwhichthenumberofplateswashediscomparedtothenumberofplateswashedusingastandardproduct.3.SignificanceandUse3.1Theguide,asnowconstituted,isnotsuitableforrankingofhanddishwashingproducts,sincenobasisisavailableatthistimeforcorrelationofthefoamstabilityoftheseproductsusinganyparticularfoodsoilorcombinationofsoilswithconsumers’rankingofperformance.3.2Therelativefoamstabilityrankingofhanddishwashingdetergentproductswillvarygreatlydependingonthetypeoffoodsoilsusedinthetest.Therefore,selectionofthestandardfoodsoiltobeusedinatestshallbemadebyagreementbetweentheinterestedpartiesonthebasisofexperience.3.3Thislaboratoryscreeningguideincludesflexibilityinseveralareassoastoallowitsusebythemaximumnumberoflaboratories,withoutpurchaseofsignificantadditionalequip-ment.Itshouldberecognized,therefore,thatdifferencesinspecificequipmentm...
