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Evaluation of a Hot Print System for the development of latent fingermarks on thermal paper: A pseudo-operational trial
- Source :
- Sciencejustice : journal of the Forensic Science Society. 60(1)
- Publication Year :
- 2019
-
Abstract
- The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link. 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.
- Subjects :
- Paper
Materials science
Hot Temperature
Ultraviolet Rays
fingerprint
01 natural sciences
Pathology and Forensic Medicine
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
Humans
030216 legal & forensic medicine
Dermatoglyphics
porous substrate
UV enhancement
amino acids
Porous substrate
010401 analytical chemistry
Ninhydrin
Thermal paper
Image Enhancement
0104 chemical sciences
chemistry
Chemical engineering
Reagent
receipts
Indicators and Reagents
Porosity
Subjects
Details
- ISSN :
- 18764452
- Volume :
- 60
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Sciencejustice : journal of the Forensic Science Society
- Accession number :
- edsair.doi.dedup.....1d0a8be602af7547a0dc4b01939c0667