Chemical methods for developing latent fingerprints must be used in the following sequence:
A)Iodine, physical developer, ninhydrin.
B)Iodine, ninhydrin, physical developer.
C)Ninhydrin, iodine, physical developer.
D)Ninhydrin, physical developer, iodine.

Question

Quizplus · Accepted Answer

The correct sequence for developing latent fingerprints using chemical methods is to first use iodine, as it is a sublimation technique and does not chemically react with the fingerprint residue. Next, ninhydrin is used because it reacts with amino acids to produce a purple color, and this step does not interfere with the previous iodine step. Finally, a physical developer is used, which is a silver nitrate-based reagent that reacts with the remaining components in the fingerprint residue, such as lipids and salts. This sequence ensures that each chemical method can be applied without destroying or interfering with the marks developed by the previous chemicals.

Chemical Methods for Developing Latent Fingerprints Must Be Used in the Following