What color image does iodine vapour produce when absorbed by latent fingerprint deposits?

What color image does iodine vapour produce when absorbed by latent fingerprint deposits?

• A. Black
• B. Brown
• C. Purple
• D. Yellow

Answer: (B)

Iodine vapor is utilized in the process of developing latent fingerprints, particularly on non-porous surfaces. When iodine vapor comes into contact with oily or fatty residues present in the fingerprint deposit, it forms a compound that reveals the print. The resulting image is typically brown because iodine particles adhere to the organic materials in the fingerprint, creating a visible contrast against the background surface. This brown color is often transient, meaning it may fade over time, but it is the characteristic color produced during the iodine fuming process for latent fingerprints.

Iodine vapor is utilized in the process of developing latent fingerprints, particularly on non-porous surfaces. When iodine vapor comes into contact with oily or fatty residues present in the fingerprint deposit, it forms a compound that reveals the print. The resulting image is typically brown because iodine particles adhere to the organic materials in the fingerprint, creating a visible contrast against the background surface. This brown color is often transient, meaning it may fade over time, but it is the characteristic color produced during the iodine fuming process for latent fingerprints.