Reagent for detecting fingerprints on dark surfaces MDR-B. For light surfaces, it is necessary to use reagent MDR-Ch.
Finely dispersed reagent MDR-B is an aqueous suspension. The reagent adheres to the sweat-and-fat components of fingerprints and reveals them in black tones. MDR-B is used to detect fingerprints on smooth, porous, metal, plastic, including wet surfaces. This reagent is used instead of or after a physical developer. Traces can be carefully removed using traditional trace copying materials (fingerprint film or tape). The reagent can be used to process fingerprints detected by ninhydrin to enhance their contrast.
Reagent MDR-B allows you to detect traces that are not detected by ninhydrin. In small concentrations, MDR-B enhances traces detected by silver nitrate, which is especially important for traces that were formed a long time ago.
Distinctive features of MDR from foreign analogues:
after detection, the trace remains for a long time (several days);
the detected trace can be transferred to fingerprint film, lifter or tape;
shelf life in dry form is at least 1 year. Shelf life after dilution is at least 2 weeks;
quantity in the package: reagent per 1 liter (4 * 0.25).