Fingermark visualisation on uncirculated £5 (Bank of England) polymer notes: Initial process comparison studies
Autor: | Eleigh R. Brewer, Vaughn G. Sears, Rory Downham, Roberto S.P. King, Aoife Luscombe |
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Rok vydání: | 2017 |
Předmět: |
Adult
Male Paper Infrared Rays Metal Nanoparticles Nanotechnology 01 natural sciences Fluorescence Pathology and Forensic Medicine Magnetic powder 03 medical and health sciences 0302 clinical medicine White light Humans Cyanoacrylates 030216 legal & forensic medicine Dermatoglyphics chemistry.chemical_classification Chemistry Silicates 010401 analytical chemistry Ninhydrin Polymer Forensic Medicine Middle Aged 0104 chemical sciences Powder suspension Female Indicators and Reagents Powders Volatilization Law Copper |
Zdroj: | Forensic Science International. 275:30-43 |
ISSN: | 0379-0738 |
Popis: | Experiments were conducted to investigate the effectiveness of a range of fingermark visualisation processes on brand new, uncirculated, £5 polymer banknotes (and their test note predecessors), as produced by the Bank of England (BoE). In the main study of this paper, a total of 14 individual processes were investigated on BoE £5 polymer banknotes, which included both ‘Category A’ processes (as recommended in the Home Office Fingermark Visualisation Manual) as well as recently developed processes, including fp Natural ® 2 powder (cuprorivaite) from Foster + Freeman and a vacuum metal deposition sequence that evaporates silver followed by zinc. Results from this preliminary investigation indicate that fp Natural ® 2, multimetal deposition, Wet Powder ™ Black, iron oxide powder suspension and black magnetic powder are the most effective processes on these uncirculated £5 BoE polymer banknotes, when viewed under “primary viewing” conditions (white light or fluorescence). Additional fingermarks were visualised on the polymer banknotes following the subsequent use of reflected infrared imaging and lifting techniques, and with the benefit of these techniques taken into consideration, the aforementioned processes remained amongst the most effective overall. This work provides initial insight into fingermark visualisation strategies for BoE £5 polymer banknotes, and the need for further studies in order to generate mature operational guidance is emphasised. |
Databáze: | OpenAIRE |
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