Detection of latent fingerprints on counterfeit currency
| dc.creator | Lin, Tao | |
| dc.date.accessioned | 2016-11-14T23:12:14Z | |
| dc.date.available | 2011-02-18T19:10:43Z | |
| dc.date.available | 2016-11-14T23:12:14Z | |
| dc.date.issued | 1996-12 | |
| dc.description.abstract | The 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.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/2346/9733 | en_US |
| dc.language.iso | eng | |
| dc.publisher | Texas Tech University | en_US |
| dc.rights.availability | Unrestricted. | |
| dc.subject | Fingerprints | en_US |
| dc.subject | Counterfeits and counterfeitings | en_US |
| dc.subject | Chemical tests and reagents | en_US |
| dc.title | Detection of latent fingerprints on counterfeit currency | |
| dc.type | Dissertation |