Designation:D6409−99(Reapproved2014)StandardPracticeforColorTestswithSheepskinSkiver1ThisstandardisissuedunderthefixeddesignationD6409;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversmakingcolortestsofalltypesofvegetabletanningextractsandofvegetabletanningmaterialstodeterminethecolorimpartedtotannedskins.1.2ThevaluesgiveninSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1517TerminologyRelatingtoLeatherD4901PracticeforPreparationofSolutionofLiquidVeg-etableTanninExtractsD4905PracticeforPreparationofSolutionofSolid,PastyandPowderedVegetableTanninExtractsD6405PracticeforExtractionofTanninsfromRawandSpentMaterials2.2ALCAMethods:A40ColorTestswithSheepskinSkiver33.Terminology3.1Definitions:3.1.1FordefinitionsofgeneralleatherandtanningtermsusedinthispracticerefertoTerminologyD1517.3.1.2pickledskiver—asheepskinskiverthathasbeenpick-ledinasolutionofsaltandsulfuricacid.3.1.3sheepskinskiver—thegrainsplitofade-wooledsheepskin.Apickledskiverisusedforthistest.3.1.4tannin—anastringentsubstancefoundinthevariouspartsofplantssuchasbark,wood,leaves,nuts,fruits,roots,etc.3.1.5vegetabletannins—mixturesofsubstances(naturalproducts)obtainedfromplanttissuesbywaterextractionwhichhavethechemicalandphysicalpropertiesnecessarytoconvertanimalhidesandskinsintoleather.4.SummaryofPractice4.1Aspecimenofpickledskiveristannedwithasampleofvegetabletanningliquorinordertodeterminethecolorwhichwillbeimpartedtoaclear,cleanhideorskinthatistanne...
