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dc.creatorLin, Tao
dc.date.available2011-02-18T19:10:43Z
dc.date.issued1996-12
dc.identifier.urihttp://hdl.handle.net/2346/9733en_US
dc.description.abstractThe unambiguous identification of a counterfeiter by fingerprint evidence hinges on the determination whether the fingerprint was placed on the counterfeit note before (FB) or after inking (FA). Three counterfeiting methods, including color copying , offset printing and Inkjet printing have been investigated. A number of techniques, including 5-methoxyninhydrin/ZnCl2, DFO, DMAC, physical developer, colloidal gold, membrane transfer, vapor development, and finally, Eu-DTPA/OP have been explored in an attempt to distinguish between fingerprints on counterfeit currency before and after the inking. Most methods fail to show a difference between FB and FA fingerprints because of the permeability problem of the inks. However, the lipid-sensitive Eu-DTPA/OP procedure partially overcomes the permeability problem and shows substantial difference between FB and FA fingerprints for color copying. There are subtle differences between before and after fingerprint fluorescence spectra (both 5-methoxyninhydrin/ZnCl2 and Eu-DTPA/OP). Given that one has to contend with finger contamination, the spectroscopy at present may not be practically useful, but it shows potential if proper rare-earth-based strategies are used.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherTexas Tech Universityen_US
dc.subjectFingerprintsen_US
dc.subjectCounterfeits and counterfeitingsen_US
dc.subjectChemical tests and reagentsen_US
dc.titleDetection of latent fingerprints on counterfeit currency
dc.typeDissertation
thesis.degree.namePh.D.
thesis.degree.levelDoctoral
thesis.degree.grantorTexas Tech University
thesis.degree.departmentPhysics
dc.rights.availabilityUnrestricted.


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