Physical Developer reacts with sebaceous sweat to produce what colored deposit?

The Physical Developer is a reagent used in the development of latent fingerprints, particularly effective on surfaces where sebaceous sweat is present. When sebaceous sweat reacts with the components of the Physical Developer, it produces a grey-silver colored deposit. This deposit results from the formation of a metal-silver complex, which provides a visible contrast against the background surface.

This color is distinctive and allows forensic professionals to see and analyze the latent prints effectively. The shade of grey-silver helps in identifying finer details of the print that might be missed with other methods or if the prints are faint. Understanding this chemical reaction is crucial for forensic experts who rely on the nuanced differences in the visibility of prints to collect and analyze evidence properly.