In forensic investigations, experts use a method called fingerprint dusting to detect latent fingerprints—those not visible to the naked eye. A fine powder, such as black, magnetic, or fluorescent powder, is lightly brushed onto surfaces where prints are suspected. The powder sticks to the natural oils, sweat, and other residues left by the skin. Before dusting, investigators sometimes use special lighting at low angles to help locate potential prints without disturbing them. Once a fingerprint