Bluhm and Lougheed (1968) identified ideal temperature conditions for preserving latent prints on nonporous surfaces as?

Bluhm and Lougheed's study in 1968 highlighted that the ideal temperature range for preserving latent prints on nonporous surfaces is between 40-55 degrees. This range is critical because temperatures that are too low may not provide optimal conditions for the chemical processes that help to make latent prints more visible, while significantly higher temperatures could potentially degrade the oils and residues that comprise the prints. Maintaining this specific temperature range helps ensure that the prints remain intact and well-preserved for analysis, thus making it easier for forensic personnel to obtain high-quality examinations.