METHOD OF PRODUCING MAGNETIC LUMINESCENT FINGERPRINT POWDER Russian patent published in 2019 - IPC C22C33/02 B22F1/00 A61B5/1172 

FIELD: technological processes.

SUBSTANCE: invention relates to production of finely dispersed colloidal systems for detection of latent traces of hands left on various trace-receiving objects. Method of producing a magnetic luminescent fingerprinting powder involves preparing a mixture by mechanically mixing 50–60 wt% of powdered iron, 5–10 wt% of schungite, 5–20 wt% of luminophore E-515-115, 10–25 wt% of starch, and 5–10 wt% of rhodamine 6g.

EFFECT: ensuring selectivity of adhesion properties of dactyloscopic powder with respect to the surface of the papillary line of the fat-and-oil track due to optimally selected granulometric composition of the disperse medium, which enables to detect post-fat traces of a person on a wide range of trace carrier surfaces.

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