MBD and BBD are believed to react primarily to the cyanoacrylate that adheres to the latent print, with a secondary reaction to amino acid or protein contained in the latent print residue. To use one of these reagents, the specimen is first fumed with cyanoacrylate. Latent prints have been developed on a variety of materials, including plastic bags, duct tape, glass, and mental items. All specimens that are normally processed by cyanoacrylate fuming may be subsequently processed with the reagents. The chemical may be applied by dipping, spraying, brushing, or in almost any manner that will allow the latent print to become saturated with the chemical. After the reagent has been applied, the specimen should be allowed to dry until all the carrier has evaporated. Formulations for carriers for the reagents are furnished at the completion of the article. The article also describes the detection of blood prints on latex painted surfaces using MBD. The authors advise that although excellent results are obtained by the use of MBD or BBD, current research is developing a better solution by combining other fluorescent tags with MBD to produce even a brighter fluorescence. 3 figures and 2 references