Bi-chromatic powder grey has the remarkable properties of appearing black when dusted on a light-coloured surface and appearing silver when dusted on a dark-coloured surface. You can use the same Zetra® fibreglass brush and Bi-Chromatic Powder Grey for 90 per cent of your dusting requirements at crime scenes. The greatest advantage of using Bi powder is that the lifted prints will be black when placed on a white backing card. This eliminates the bother of comparing latent prints with light-coloured ridges on a black background against rolled prints with black ridges on a white background. It also means that only white backing cards will be needed. There is no need for black backing cards with Bi-Chromatic Powder
Also known as Dual Use Powder
The Role of Latent Fingerprint Powder in Forensic Investigations.
Latent fingerprint powder is a crucial tool in the field of forensic science, aiding in the visualization and recovery of latent fingerprints from various surfaces. This fine powder plays a pivotal role in criminal investigations, enabling law enforcement agencies and forensic experts to identify suspects and link individuals to crime scenes through the analysis of fingerprint evidence.
To apply latent fingerprint powder, one must carefully and systematically sprinkle or brush the powder onto surfaces suspected to contain latent fingerprints. The powder adheres to the natural oils and sweat left behind by the ridges of the skin, making the latent prints visible and enabling their recovery for further analysis.
Types of Latent Fingerprint Powder
Latent fingerprint specialists use various types of powders to reveal prints, such as black, white, and metallic powders. For example, they use black powder on light-coloured surfaces and white powder on dark-coloured surfaces. They apply metallic powders like silver or gold on multicoloured or reflective surfaces to enhance the visibility of the print.
Forensic experts utilise specialised techniques to actively lift the latent prints once they become visible through the application of powder. These techniques may involve carefully applying clear adhesive tape over the powdered print and then lifting it to preserve the fingerprint.
Significance in Forensic Investigations
Latent fingerprint powder serves as a cornerstone in forensic investigations, aiding in the identification of individuals, linking suspects to crime scenes, and providing crucial evidence for criminal prosecutions. The recovery and analysis of latent fingerprints using this essential tool contribute significantly to the resolution of criminal cases and the administration of justice.
In conclusion, Bi-Chromatic Powder Grey is an indispensable resource in forensic science, playing a pivotal role in visualizing, recovering, and preserving latent fingerprints from a variety of surfaces. Its application and utilization are essential in criminal investigations, helping law enforcement agencies and forensic experts in the identification and apprehension of suspects, ultimately contributing to the pursuit of justice.