What is a suitable clearing solution for both ninhydrin and silver nitrate?

The suitable clearing solution for both ninhydrin and silver nitrate is bleach. When using ninhydrin, which is a common reagent for detecting amino acids in latent fingerprints, a clearing solution may be necessary to make the developed prints more visible and to decrease background interference. Bleach is effective in this context because it has strong oxidizing properties that can effectively clear out unwanted residues and enhance the contrast of the developed prints.

Similarly, silver nitrate is used in the development of latent prints as it reacts with the salt in the latent print's composition, and like ninhydrin, the visualization often requires a clearing step. Bleach can also help in this scenario by reducing the background staining that can occur from the application of silver nitrate.

While other options may have some relevance in different contexts (for instance, vinegar or alcohol may be used in various cleaning processes or as solvents), they do not serve the same purpose as bleach for clearing ninhydrin and silver nitrate developed prints. Therefore, bleach stands out as a suitable and effective choice for this specific application in latent print development.