Which technique is applicable when lifting fingerprints from human skin?

The technique that involves dusting with black powder after applying pressure is appropriate for lifting fingerprints from human skin because it allows for the visual enhancement of the fingerprint patterns. When applying black powder to the skin, the powder adheres to the oils and sweat left by the fingers, which can help make a latent fingerprint more visible. This method requires careful application to avoid damaging the skin or smudging the print and is commonly used in forensic practices.

This technique effectively captures the unique details of the fingerprint, which is essential for identifying individuals in forensic investigations. In contrast, other methods mentioned may not provide the same benefit or could potentially harm the skin or produce less accurate results in detecting prints.