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Microwave selective thermal development of latent fingerprints on porous surfaces: Potentialities of the method and preliminary experimental results
- Publication Year :
- 2013
-
Abstract
- The thermal development of latent fingerprints on paper surfaces is a simple, safe, and chemicals-free method, based on the faster heating of the substrate underlying the print residue. Microwave heating is proposed for the first time for the development of latent fingerprints on cellulose-based substrate, in order to add to the thermal development mechanism the further characteristic of being able to heat the fingerprint residues to a different extent with respect to the substrate, due to the intrinsic difference in their dielectric properties. Numerical simulation was performed to confirm and highlight the selectivity of microwaves, and preliminary experimental results point out the great potentialities of this technique, which allowed developing both latent sebaceous-rich and latent eccrine-rich fingerprints on different porous surfaces, in less than 30 sec time with an applied output power of 500 W. Microwaves demonstrated more effectiveness in the development of eccrine-rich residues, aged up to 12 weeks.
- Subjects :
- Adult
Male
Paper
Hot Temperature
Materials science
Surface Properties
Forensic science, Latent fingerprints, Microwave, Numerical simulation, Selectivity, Thermal development
Analytical chemistry
Dielectric
Numerical simulation
Eccrine Glands
Pathology and Forensic Medicine
Sebaceous Glands
Thermal
Genetics
Humans
Selectivity
Dermatoglyphics
Microwaves
Sweat
Porosity
Computer simulation
Thermal development
Middle Aged
Sebum
Latent fingerprints
Microwave heating
Female
Forensic science
Biological system
Microwave
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....8226f0c65a9bc734da2e98958ef2d4cb