Designation:E1789–96StandardGuideforWritingInkIdentification1ThisstandardisissuedunderthefixeddesignationE1789;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisguideisintendedasageneraloutlineforuseinforensicinkexaminations,wheretheintentionistoidentifyaninkformulaortype.Itisdesignedbothfortheexperienceddocumentexaminer(seeGuideE444)andforthoseunfamiliarwithpreviouslyreportedprocedures.Theaimistodescribethosetechniquesthatwillprovidethemostinformationaboutaninkwiththeleastdamagetothedocument.Thisguidereferstowell-reportedandthoroughlytestedtechniquescurrentlyinusebyforensicdocumentexaminers,chemists,andotherscientists.Followingtheproceduresasoutlined,anexaminercanaccuratelydiscriminatebetweeninkformulas;aswellassignificantlyreducingthepossibilityofreportingfalsematchesofinksamplesfromdifferentsourcesorincorrectlydifferentiatinginksamplesfromacommonsource.Identificationsofinkformulasmaybeaccomplishedthroughtheuseofanadequatecollectionofstandards.Thenecessarycompletenessofacomparisoncollectionandlimitationsofconclusionswillbeaddressedintheguide.1.Scope1.1Thisguidecoversassistingforensicexaminersiniden-tifyingwritinginks.Includedinthisanalysisschemearethenecessarytoolsandtechniqueswhichhavebeensuccessfullyutilizedtoreachconclusionsastothecommonordifferentoriginoftwosamplesofink.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D1535TestMethodofSpecifyingColorbytheMunsellSystem2E131TerminologyRelatingtoMolecularSpectroscopy3E284TerminologyofAppearance2E444GuidetoDescriptionsofScopesofWorkRelatingtoForensicSciencesforQuest...
