Fluorescent manifestations for the appearance of blood handprints, products by blood handprint scoffing agents (300ml) and blood handprint fixer (400mlTwo parts. First with blood handprint fixant spray material, and then with blood handprint fluorescent display agent spray, rinse with water, dry. Use365-450nmSpectrum irradiation of the material, wearing yellow glasses to observe the fluorescent of the blood-printed blood. Does not affect subsequentDNAInspection.