Fingerprint powder is a fine powder used in forensic science to visualize and collect fingerprints from various surfaces. It adheres to the oils and sweat left behind by fingers, making the prints visible for analysis. Typically made from materials like carbon black or aluminum, fingerprint powder comes in different colors to contrast with the surface being examined. Investigators apply it using a brush or a puff applicator, allowing them to lift the prints with adhesive tape for further examination in a laboratory setting.