What chemical is commonly used to reveal latent fingerprints on non-porous surfaces?

The use of super glue, or cyanoacrylate, is a well-established method for revealing latent fingerprints on non-porous surfaces such as metal, glass, and plastic. When cyanoacrylate vapor is applied to these surfaces, it adheres to the moisture and oils present in the fingerprint residue, forming a hard, white substance that makes the print visible. This technique is particularly effective because it develops sharp and clear images of fingerprints without causing damage to the surface being examined.

In contrast, acetone is a solvent that may remove fingerprints rather than develop them, while iodine vapor is primarily used for porous surfaces and requires additional steps for photography. Hydrogen peroxide is not typically used in fingerprint development; its chemical properties are more aligned with disinfection and oxidation rather than enhancing the visibility of fingerprints. Super glue, therefore, stands out as the most appropriate and effective choice for this specific application.