Evaluation of a Solvent-Free p-Dimethylaminobenzaldehyde Method for Fingermark Visualization with a Low-Cost Light Source Suitable for Remote Locations

Fritz, Patrick; van Bronswijk, Wilhelm; Dorakumbura, Buddhika; Hackshaw, Brett; Lewis, Simon W.
January 2015
Journal of Forensic Identification;2015, Vol. 65 Issue 1, p67
Academic Journal
The guidelines set forth by the International Fingerprint Research Group (IFRG) were used to plan and conduct the evaluation of a dry contact p-dimethylaminobenzaldehyde (DMAB) approach to the treatment of latent fingermark deposits on porous substrates. It was found that the IFRG guidelines provided a practicable framework for the implementation of method optimization and comparison studies. Extensive investigations into the development method and its subsequent use across a range of conditions and substrates showed that the dry contact DMAB method is not as sensitive as the recommended ninhydrin techniques. Illumination in the form of an inexpensive LED light source was shown to be a promising alternative to the much more expensive Rofin Polilight, especially in teaching or remote environments.


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