Description: This forensic bloodstain reagent will add a touch of realism to your forensic science class and turn your students into crime scene investigators! The Bluestar forensic bloodstain reagent system is based on luminol. It consists of two reagents in tablet form that are dissolved together in water and sprayed lightly onto a surface. If the spray encounters any blood residues, a blue luminescence occurs due to a reaction between the reagent solutions, catalysed by haem, a component of haemoglobin. In dim light conditions, the blue luminescence is easily seen, even on very dilute blood residues. Teachers can discuss the composition of blood, demonstrate real forensic technique and explain this form of luminescence in terms of a release of light energy.
To use this product, measure 125mL of distilled water into a fine mist spray bottle then add the pair of reagent tablets, one white and one beige. Gently swirl the solution until the tablets have dissolved. Avoid vigorous shaking. Spray a light mist onto the surface you wish to investigate. An intense blue (430nm) luminescence occurs (visible in semi-darkness) when the solution comes into contact with blood residues. Very small quantities of blood will provoke a reaction, and the luminescence will generally last for several minutes. The solution can be re-applied several times to the same area.
QTY: 2 tablets.
- Luminol will only work on real blood.
- Aim to use within 4-6 hours. After 8 hours, discard any unused solution and prepare a fresh batch.
- One pair of tablets will provide enough solution (125mL) to examine a surface area of up to 25m2.