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This research was to study the preparation of fluorescent dust powder to enhance the detection of ultra-bright latent fingerprints using natural plant extract associated with adsorption on silica gel particles by a simple and cheap method environmentally friendly. To study the physical and chemical properties of the fluorescent powder, various factors affecting the latent fingerprints detection including different surface characteristics, temperature, time, and overlapping passive fingerprints were investigated. From the results, it was found that the fingerprints on the surface of different materials could be performed, and gave good inspection trace,which can be seen with naked eye and appear brightly under UV light at a wavelength of 366 nm. For the persistence study of the latent fingerprints, it was also found that when kept it in a dark place at room temperature for 30 days, the fingerprints were still visible to the naked eye and glow clearly under UV light.In addition, the overlapping fingerprints can be clearly identified. Therefore, the study of the fluorescent silica gel dust powder demonstrates good performance,and it is a potential use to detect latent fingerprints as a witness in forensic processes.

Fluorescent Labeling of Silica Gel Powder using Zingiber Montanum Extract fora Bright Latent Fingerprint Detection under UV Light