Small Particle Reagent (SPR) can be used on what type of surfaces?

The Small Particle Reagent (SPR) is a vital tool used in the field of forensic science for the development of latent fingerprints. It is particularly useful because it adheres to the fatty components found in fingerprints, making it effective on certain surfaces that are otherwise challenging for conventional fingerprint development techniques.

When considering the context of the question, the correct answer highlights that SPR can be utilized on all non-porous surfaces, including those that are wet. This capability is significant because non-porous surfaces, such as glass or plastic, do not absorb moisture or oils, allowing the SPR to effectively bind to the residue left behind by fingerprints. Furthermore, its ability to function on wet surfaces expands the range of potential applications, as fingerprints can often be left in damp conditions, making the SPR a flexible and powerful tool in forensic investigations.

Other options restrict the use of SPR to specific categories of surfaces or conditions that do not take into account the full range of SPR's functionality and versatility in forensic applications. The correct answer embraces the broad applicability of SPR, emphasizing its importance in the recovery of fingerprints from a variety of conditions in real-world scenarios.