Which method is commonly employed for visualizing prints on non-porous surfaces?

Super Glue fuming, or cyanoacrylate fuming, is a highly effective method for visualizing latent prints on non-porous surfaces. This technique works by exposing the item with the latent print to cyanoacrylate vapors. The vapors adhere to the moisture and lipids (oils) in the fingerprint, forming a visible white residue that outlines the ridge patterns of the print. This method is particularly advantageous for non-porous surfaces such as glass, plastic, and metal, which do not absorb moisture, making them more challenging for traditional print development techniques.

In contrast, while magnetic powder and powder dusting are useful for developing prints, they are more suitable for porous or rough surfaces where the powder can adhere to the oils in the fingerprint. Iodine fuming is another technique that works on porous surfaces, producing a temporary visual of the print that may require additional fixation methods to make it permanent. Thus, Super Glue fuming stands out as the optimal choice for non-porous materials due to its ability to create a permanent and visible print without the limitations faced by other methods.