Developments in Fingerprint Visualisation

Comparative study of rose and hibiscus petals powders in latent friction ridge analysis

“…Na zdolność proszku do przylegania silnie wpływają rozmiar i kształt jego ziaren. Proszki gruboziarniste zazwyczaj przylegają gorzej, a drobnoziarniste lepiej i wydajniej (Bumbrah, Sodhi, Kaur, 2019;Pounds, 1988;wood, James, 2009). Tradycyjne proszki daktyloskopijne są bardzo przydatne w utrwalaniu śladów linii papilarnych, mają one jednak swoje wady, takie jak słaba rozdzielczość, niska czułość i selektywność oraz toksyczność (allman, 1991; Sodhi, Kaur, 2001).…”

“…The size and shape of the powder particle plays an important role in determining the adhering capacity of powder. Generally, powder with larger size adhere less and smaller size power adhere easily and more efficiently (Bumbrah, Sodhi, Kaur, 2019;Pounds, 1988;wood, James, 2009). while traditional powders are very useful for developing fingerprints, they also have certain disadvantages, including low resolution, poor sensitivity and selectivity, and toxicity (allman, 1991;Sodhi, Kaur, 2001).…”

Visualization of Sweat Fingerprints on Various Surfaces Using a Conjugated Polyelectrolyte

“…Latent fingerprints (LFPs) are crucial clues in criminal investigations. − In forensic science, considerable efforts have been devoted to exploring high-resolution visualization methods for the detection of LFPs, such as chemical staining, powder dusting, and spectroscopic analysis. − Recently, many state-of-the-art reagents and methods have been developed, such as nanoparticle reagents, , nucleic acid recognition reagents, − electrochemical/electrochemiluminescence methods, , and aggregation-induced fluorescence (FL). , Among them, the reactive detection method using chemical reagents has been most widely used. − Some chemical reagents such as ninhydrin (NH) and 1,8-diaza­fluoren-9-one (DFO) have been commercialized and are widely available in spray cans and ready-to-use bottles . Cyanoacrylate (CA) is often fumed onto LFPs to produce highly resolved images.…”

Surfactant chemistry for fluorescence imaging of latent fingerprints using conjugated polyelectrolyte nanoparticles

“…In forensic science, many methods and sequences, including powder dusting, chemical staining, and spectroscopic techniques, have been explored for the visualization of LFPs under specific circumstances. 2 In particular, the detection of LFPs using chemical reagents is of particular importance for their high visualization. Some reagents, such as ninhydrin (NH), 1,8-diazafluoren-9-one (DFO), and cyanoacrylate (CA), have been commercialized, leading to many advantages in their utilities.…”