What kind of surface is vacuum metal deposition most effective on?

Vacuum metal deposition is particularly effective on smooth surfaces due to the nature of the process and how it interacts with fingerprint residue. This method involves depositing a thin layer of metal, usually gold or zinc, onto a surface to enhance the visibility of latent fingerprints. On smooth surfaces, the deposition can evenly coat the area, allowing for a clear delineation of the fingerprint ridges and patterns.

Smooth surfaces facilitate better adhesion and uniformity during the metal deposition process, leading to higher-quality latent print visualization. In contrast, porous materials may absorb contaminants or the metal itself, rough textures can hinder an even application and visibility, and transparent films might not hold the deposited metal in a way that reveals the prints effectively. Consequently, the characteristics of smooth surfaces make them the ideal candidates for vacuum metal deposition techniques.