Designation:D5355−95(Reapproved2012)StandardTestMethodforSpecificGravityofOilsandLiquidFats1ThisstandardisissuedunderthefixeddesignationD5355;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthespecificgravityofoilsandliquidfatsbycalculatingtheratiooftheweightofaunitvolumeofthesampletotheweightofaunitvolumeofwaterat25°C.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1density—weight/unitvolumeexpressedasgramspercentimetre.2.1.2liquidfats—fatsthatmeltbelow58°C.2.1.3oils—substancesthatarefluidat25°C,consistingofglyceridesoffattyacids,aliphatichydrocarbons,andaromatichydrocarbons.2.1.4specificgravity—theratioofthedensityofasubstancetothedensityofthereferencesubstance.3.SignificanceandUse3.1Thistestmethodisusedtomeasurethespecificgravityofalloilsandliquidfatsthatareusedtosoftenleather,orthatareusedinproductstosoftenleather.Thespecificgravityisoneparameterthatcanbeusedtomonitorthequalityoftheseproducts.4.Apparatus4.1SpecificGravityBottles,withwell-fittinggroundglassjointsandacapacityofapproximately50mL.4.2WaterBath,maintainedat2560.2°C.4.3WaterBath,maintainedat6060.2°C.4.4Thermometer,laboratorythermometerhavingarangefrom−20to102°Cwith0.1or0.2subdivisions.5.Procedure5.1CalibrationoftheSpecificGravityBottles—Cleananddrythoroughlyandthenfillwithrecentlyboiledandcooleddistilledwaterat20to23°C.Fillthebottletooverflowingbyholdingthebottleonitssideinsuchamannerastopreventtheentrapmentof...
