Which of the following is NOT an acceptable technique to use inside a fuming cabinet?

The correct identification of the technique that is NOT acceptable to use inside a fuming cabinet is surface scraping. A fuming cabinet is specifically designed for processes that involve vapor or fuming applications, such as superglue fuming or ninhydrin, where vapors are utilized to develop latent prints. These methods require controlled environments to optimize the fuming process and ensure proper handling of potentially hazardous materials.

Surface scraping, on the other hand, involves physically removing material from a surface to collect latent prints, which does not produce vapors or fumes and does not benefit from the controlled environment of a fuming cabinet. Therefore, this technique is better suited for use in different environments that allow for direct physical handling of surfaces and materials.

In contrast, superglue fuming, ninhydrin, and physical developer are all techniques that are compatible with the fuming cabinet. Superglue fuming relies on the vaporized cyanoacrylate to adhere to latent prints and visualize them, while ninhydrin requires a vapor phase to react with amino acids in the latent print residue. Physical developer also relies on the chemical reactions that occur in a fuming atmosphere to visualize prints. As such, surface scraping is out of context for a