What type of surface would typically NOT retain latent fingerprints effectively?

Metal surfaces typically do not retain latent fingerprints effectively due to their smooth and non-porous characteristics. When a person touches a metal surface, the natural oils and sweat from the skin do transfer, but the properties of the metal do not allow these residues to adhere as well as they would on other surfaces.

In contrast, porous surfaces absorb the moisture and oils from fingerprints, making it easier for them to be retained. Glass and plastic surfaces also tend to retain fingerprints well because they can hold the oils and moisture on their surfaces, allowing for clearer residue to form. This ability to retain latent fingerprints is crucial in forensic science for identifying individuals based on their unique fingerprint patterns.