Get Application To Participate In The Evaluation 2 Of Latent Fingerprint ... - Biometrics Nist

Latent Fingerprint Development Techniques A technician will often use print powders to make the print visible so that it may be photographed, which will later be used in the analysis process. Fingerprint powders will adhere to the oils and moisture of the latent print and expose the patterns of friction ridges.

Some methods in use on a daily basis involve magnetic and fluorescent powders, alternate light sources, superglue processing, dye stain techniques, and computerized digital imaging. The goal is to detect and capture a faint and almost nonexistent latent trace of a fingerprint.

One of the most common methods for discovering and collecting latent fingerprints is by dusting a smooth or nonporous surface with fingerprint powder (black granular, aluminum flake, black magnetic, etc.).

Several methods are used for fingerprinting: denaturing gradient gel electrophoresis (DGGE), temperature gradient gel electrophoresis, terminal restriction fragment length polymorphism, and single-strand conformation polymorphism [35].

Evaluation of Latent Friction Ridge Technology (ELFT) is a series of public tests of one-to-many automated latent friction ridge searching algorithms.

Conventional procedures used by the latent print examine include dusting, iodine fuming, silver nitrate development, and ninhydrin treatment. Newer techniques, such as metal vacuum deposition and autoradiography, are usually not feasible because they require complex instrumentation and considerable technical expertise.