Abstract
Enhancement of latent fingermarks on thermal paper poses a number of problems when using traditional methods used for porous substrates due to blackening of the thermal layer as a result of polar solvents present within the reagents and high temperatures oxidising the acid/dye complex. Thus, methods which prevent such reactions are favoured for the development of latent prints on said substrates. A comparative pseudo-operational trial using UV, Hot Print System (HPS), ninhydrin and ThermaNIN was performed on 1000 thermal paper substrates gathered from various sources. The results indicated that the most effective method was an acetone pre-wash followed by ninhydrin. The sequence of HPS-ninhydrin was similarly effective when compared to ninhydrin as a sole technique. ThermaNIN produced fewer marks than ninhydrin but was superior to HPS. Whilst the HPS developed some fingermarks, there was only a very small number of marks uniquely developed by it.
| Original language | English |
|---|---|
| Number of pages | 7 |
| Journal | Science and Justice |
| Early online date | 12 Aug 2019 |
| DOIs | |
| Publication status | E-pub ahead of print - 12 Aug 2019 |
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Evaluation of a Hot Print System for the development of latent fingermarks on thermal paper : a pseudo-operational trial. / Robb, Kiera; Deacon, Paul; Fordyce, Laura; Fennessy, Rebecca; Farrugia, Kevin J.
In: Science and Justice, 12.08.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - Evaluation of a Hot Print System for the development of latent fingermarks on thermal paper
T2 - a pseudo-operational trial
AU - Robb, Kiera
AU - Deacon, Paul
AU - Fordyce, Laura
AU - Fennessy, Rebecca
AU - Farrugia, Kevin J.
PY - 2019/8/12
Y1 - 2019/8/12
N2 - Enhancement of latent fingermarks on thermal paper poses a number of problems when using traditional methods used for porous substrates due to blackening of the thermal layer as a result of polar solvents present within the reagents and high temperatures oxidising the acid/dye complex. Thus, methods which prevent such reactions are favoured for the development of latent prints on said substrates. A comparative pseudo-operational trial using UV, Hot Print System (HPS), ninhydrin and ThermaNIN was performed on 1000 thermal paper substrates gathered from various sources. The results indicated that the most effective method was an acetone pre-wash followed by ninhydrin. The sequence of HPS-ninhydrin was similarly effective when compared to ninhydrin as a sole technique. ThermaNIN produced fewer marks than ninhydrin but was superior to HPS. Whilst the HPS developed some fingermarks, there was only a very small number of marks uniquely developed by it.
AB - Enhancement of latent fingermarks on thermal paper poses a number of problems when using traditional methods used for porous substrates due to blackening of the thermal layer as a result of polar solvents present within the reagents and high temperatures oxidising the acid/dye complex. Thus, methods which prevent such reactions are favoured for the development of latent prints on said substrates. A comparative pseudo-operational trial using UV, Hot Print System (HPS), ninhydrin and ThermaNIN was performed on 1000 thermal paper substrates gathered from various sources. The results indicated that the most effective method was an acetone pre-wash followed by ninhydrin. The sequence of HPS-ninhydrin was similarly effective when compared to ninhydrin as a sole technique. ThermaNIN produced fewer marks than ninhydrin but was superior to HPS. Whilst the HPS developed some fingermarks, there was only a very small number of marks uniquely developed by it.
U2 - 10.1016/j.scijus.2019.08.003
DO - 10.1016/j.scijus.2019.08.003
M3 - Article
JO - Science and Justice - Journal of the Forensic Science Society
JF - Science and Justice - Journal of the Forensic Science Society
SN - 1355-0306
ER -