What methods are used to apply iodine for fingerprint development?

The application of iodine for fingerprint development is effectively done through methods that allow the iodine vapors to interact with the residues left by the fingerprints. The correct answer includes the Fuming Gun Method, Fuming Cabinet Method, and Solution Method.

The Fuming Gun Method utilizes a specialized device that generates iodine vapors directly onto the surface being examined, offering precise control and an efficient way to develop prints in situ. The Fuming Cabinet Method involves placing the item in a sealed environment where iodine crystals are heated, creating vapors that evenly disperse inside the cabinet, ensuring thorough exposure of the surface to the iodine. The Solution Method typically involves dissolving iodine in a solvent and applying it to surfaces, which helps to visualize latent prints on certain materials.

These methods are particularly effective because iodine reacts with the organic components of the fingerprint residue, leading to a temporary discoloration that reveals the prints. The other options listed include methods that are either not recognized in standard latent print development practices or combine methods not typically associated with iodine specifically. For example, the Dip Method generally refers to immersing an item in a solution, which is less useful for the specific characteristics needed for iodine fuming.