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 or aluminum, fingerprint powder comes in different colors to contrast with the surface being examined. Once the prints are visible, investigators can use tape or other methods to lift and preserve them for further examination and comparison against fingerprint databases.