Final answer:
Latent fingerprint development techniques include powder dusting, using a magnetic brush, and Small Particle Reagent (SPR); Mikrosil is not used for this purpose.
Step-by-step explanation:
The methods used in the development of latent fingerprints include powder dusting, magnetic brush technique, and Small Particle Reagent (SPR). Mikrosil is a casting material and not typically used for developing latent fingerprints. Powder dusting involves applying a powder that adheres to the oils and residues left by fingerprints, while the magnetic brush method uses a magnetic powder that can be applied without physically touching the surface, reducing the risk of damaging the prints. SPR is a wet powder suspension used on non-porous wet surfaces. Each of these methods allows for the visualization of fingerprints that are not immediately visible to the eye.
The method used in the development of latent fingerprints is Powder dusting. This technique involves applying a powder, usually black or white, to the surface where the fingerprint is located. The powder adheres to the oils and sweat left behind in the fingerprint, making it visible. The excess powder is then removed, leaving behind a clear image of the fingerprint.
Other methods mentioned in the question such as Magnetic brush, Small Particle Reagent (SPR), and Mikrosil are also used in fingerprint development, but Powder dusting is a commonly employed method.