What is a common application method for fingerprint powders?

The method of brushing is commonly used for applying fingerprint powders because it allows for a controlled and effective way to visualize latent prints on various surfaces. The technique involves using a soft brush to apply the powder lightly over the area of interest. This helps to adhere the powder to the oils and sweat residues left by the ridges of the fingerprints, making them visible.

Brushing minimizes the risk of damaging the latent print or the surface being examined. It provides a uniform application, which is essential for lifting clear and identifiable prints for analysis. This technique is widely adopted in forensic and investigative practices due to its effectiveness in revealing fingerprints on different materials, such as paper, metal, and glass.

Other options, while potentially related to fingerprinting or forensic processes, do not align with standard practices for applying fingerprint powders. Layering does not facilitate the even distribution of powder, heating is not used for powder application in this context, and absorbing typically refers to collecting or capturing prints rather than the application of powder. Thus, brushing distinguishes itself as the most effective and widely recognized method in this scenario.