Forensics – Crime Scene Practice Test

Cyanoacrylate fuming works by exposing the item to cyanoacrylate vapor, which polymerizes when it contacts the fingerprint residues (oils, amino acids, moisture) left on the surface. This polymer creates a thin, durable white layer that outlines the ridge patterns, making latent prints visible and easier to photograph or lift. It’s particularly effective on nonporous surfaces like glass, plastic, and metal. It does not dissolve oils or remove residues, nor does it stain with metal-based reagents or allow prints to be photographed without any chemical treatment.