Which is the liquid used for finding fingerprints?

Question

Which is the liquid used for finding fingerprints?

Answer 1

A latent print is the chance reproduction of the friction ridges deposited on the surface of an item. Latent prints are often fragmentary and may require chemical methods, powder, or alternative light sources in order to be visualized.

When friction ridges come in contact with a surface that is receptive to a print, material on the ridges, such as perspiration, oil, grease, ink, etc. can be transferred to the item.

Answer 2

Gases and powders are generally used to reveal and record latent prints; I don't know of any liquids that are used.