What is achieved by using Silver Nitrate in latent print processing?

Using Silver Nitrate in latent print processing is particularly effective for revealing fingerprints on porous surfaces. This compound reacts chemically with the chloride ions present in the sweat and salts left behind by a fingerprint. When Silver Nitrate is applied, it forms silver chloride upon contact with these ions, which can then be converted to metallic silver through exposure to light or heat. This results in the formation of a visible print that stands out against the background of the porous material.

While the other options discuss various aspects of latent print processing, they do not capture the unique capability of Silver Nitrate specifically in revealing prints on porous surfaces, which are traditionally more challenging to work with compared to non-porous surfaces.