DFO Fuming

DFO, 1,8 Diazafluoren-9-one, is a fluorescing ninhydrin analog found to develop up to two and a half more prints than ninhydrin itself. It is useful on porous surfaces, especially paper. Development may be accelerated through the application of controlled heat. Use it before ninhydrin. DFO also is useful to develop weak blood stains. It requires a specialized light source, such as the BLUEMAXX™, TMX200 or MMX300 alternate light sources. 

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