Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper
Latent fingerprints deposited on commercial photocopy paper were treated using various preparations of silver-based physical developer and the results from each were compared to those obtained with the standard formulation used by the Australian Federal Police. Five redox stock solutions were prepar...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
International Association for Identification
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/21342 |
| _version_ | 1848750563408216064 |
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| author | Sauzier, Georgina Frick, Amanda Lewis, Simon |
| author_facet | Sauzier, Georgina Frick, Amanda Lewis, Simon |
| author_sort | Sauzier, Georgina |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Latent fingerprints deposited on commercial photocopy paper were treated using various preparations of silver-based physical developer and the results from each were compared to those obtained with the standard formulation used by the Australian Federal Police. Five redox stock solutions were prepared with altered orders of reagent addition, and a further solution prepared with exchanged iron concentrations, to test the robustness of the method. Three redox solutions were prepared with specific reagents omitted to determine the significance of the role played by each in development. One redox solution was prepared using Tween 20 as the non-ionic surfactant to assess its suitability as a replacement for Synperonic N. An acid prewash was also prepared using malic acid as an alternative to maleic acid. Results showed the method to be robust to alterations in reagent addition, but not to significant concentration changes. The presence of all components was found to be desirable for distinguishable development of fingerprint detail. It was additionally found that Tween 20 gave at least equal performance to Synperonic N on recently deposited fingerprints. Finally, the use of malic acid gave equivalent fingerprint development but higher background in comparison to maleic acid. |
| first_indexed | 2025-11-14T07:38:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-21342 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:38:49Z |
| publishDate | 2013 |
| publisher | International Association for Identification |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-213422017-03-08T13:31:45Z Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper Sauzier, Georgina Frick, Amanda Lewis, Simon Latent fingerprints deposited on commercial photocopy paper were treated using various preparations of silver-based physical developer and the results from each were compared to those obtained with the standard formulation used by the Australian Federal Police. Five redox stock solutions were prepared with altered orders of reagent addition, and a further solution prepared with exchanged iron concentrations, to test the robustness of the method. Three redox solutions were prepared with specific reagents omitted to determine the significance of the role played by each in development. One redox solution was prepared using Tween 20 as the non-ionic surfactant to assess its suitability as a replacement for Synperonic N. An acid prewash was also prepared using malic acid as an alternative to maleic acid. Results showed the method to be robust to alterations in reagent addition, but not to significant concentration changes. The presence of all components was found to be desirable for distinguishable development of fingerprint detail. It was additionally found that Tween 20 gave at least equal performance to Synperonic N on recently deposited fingerprints. Finally, the use of malic acid gave equivalent fingerprint development but higher background in comparison to maleic acid. 2013 Journal Article http://hdl.handle.net/20.500.11937/21342 International Association for Identification fulltext |
| spellingShingle | Sauzier, Georgina Frick, Amanda Lewis, Simon Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| title | Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| title_full | Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| title_fullStr | Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| title_full_unstemmed | Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| title_short | Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| title_sort | investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper |
| url | http://hdl.handle.net/20.500.11937/21342 |