What is latent print processing?

• A. Removing fingerprints from surfaces.
• B. Developing invisible prints using powders or chemicals.
• C. Digitizing fingerprint databases.
• D. Photographing visible fingerprints.

Answer: (B)

Latent print processing means using techniques to reveal fingerprints that aren’t visible to the eye so they can be studied and compared. These prints come from skin oils and sweat left on surfaces and often cannot be seen without help. Processing makes those ridge patterns visible by applying powders that adhere to the residues on nonporous surfaces or by using chemical reagents and fumes that react with the print’s components on porous or textured surfaces. Common approaches include powders for everyday surfaces, cyanoacrylate fuming to form a light-colored film that highlights ridges, and chemicals like ninhydrin or DFO for porous materials. The goal is to visualize the latent print so it can be photographed and compared, not to remove prints, digitize databases, or photograph prints that are already visible.