Substances that emit light or fluoresce are more readily seen either with the naked eye or through photography as compared to non-light-emitting materials. If the ninhydrin method fails, the Physical Developer technique is typically used What phenomenon underlies many of the new chemical techniques used to visualize latent fingerprints? Why is this phenomenon so valuable in fingerprint visualization? -The phenomenon of fluorescence serves as the underlying principle of many of the new chemical techniques used to visualize latent fingerprints. What is the most commonly used chemical method to visualize latent fingerprints on porous materials? IF this method is unsuccessful, what other technique typically is used? -The ninhydrin method is most commonly used to visualize latent fingerprints on porous materials. When the developing print is photographed under UV light, the color of the surface will not obscure the print. (2) Fluorescent powders reveal a vivid image of a print under ultraviolet light. ![]() (1) Using magnetic-sensitive powder offers less chance that the print will be destroyed or damaged because the powder is spread using a magnetic brush that has no bristles to come in contact with the surface containing the print. Two specialized fingerprint powders are magnetic-sensitive powder and fluorescent powder. List two types of specialized fingerprint powders and name one advantage each has over traditional fingerprint powder.
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