Show and fix the surface of the smooth non-permeable object and semi-permeable object of the criminal case with fresh blood handprints or blood footprints. , the apparent fingerprint is blue (red, green) and will not be erased. After the appearance of the color contrast is obvious, the lines are coherent, very easy to take pictures.
How to use it
Method 1: With a dropper to absorb solution drip in the suspected blood handprint site (can also be based on the case of handprint left object, will have a handprint of the object soaked in the reagent, or make the reagent flow through the place left with blood handprints or spray the reagent with a spray pot on the blood handprint site), about20Rinse with a small stream of water after a second, then blow it dry with a blow-off and take a picture in natural light.
Method 2: with a dropper to absorb the solution drip in the suspected blood handprint place, wait, with the blowing ball or hair blowing cold wind to remove the residual liquid on the handprint, natural light under the photo fixed.
Method 3: Reagents can be loaded into a spray bottle and sprayed on the suspected blood-stained area,20Rinse with a small stream of water after a second, then blow it dry with a blow-off and take a picture in natural light.