Development of Fingerprints on Dry and Wet Surfaces

Introduction:Fingerprinting is a commonly used technique in forensic science. The factors which impact the quality of fingerprints identified at a crime scene include weather conditions, the surface itself, how the fingerprint was left and for how long. Materials and Methods:This research examines the reaction taking place between fatty acid residuals present in sweat and hydrophobic tails of the specific reagent. We have prepared a reagent constituting of a fluorescent dye i.e. basic yellow 40 for the development of latent fingerprints on wet and dry surfaces. It also detects fingerprints on such articles that have been accidently or deliberately wetted or buried under soil/snow. Few of the constituents used to prepare the product include the dye, titanium(IV) oxide, basic zinc carbonate, gum rosin, and zinc stearate. Though, gum rosin has several commercial applications, in this innovation it binds the dye with the adhesive constituents of the formulation. In today's world where the rate of inflation is so high, the technique used is completely eco-friendly and cost effective. The florescence shown by it helps in detecting weak and faint fingerprints that are often encountered at the site of crime.