Science project
Forensic Iodine Fuming
Iodine fuming is one of the oldest forensic techniques used to develop latent fingerprints but it is also one of the easiest. Students will learn how to fume iodine crystals that are readily available from any science supply store or school lab to develop invisible fingerprints on a piece of white paper.
Problem:
The objective of this experiment is to use iodine vapors to develop latent fingerprints on a non-porous object.
Materials:
- Iodine crystals
- Small, clear plastic container with lid
- Small piece of white paper
Procedure:
- Cut a small piece of paper approximately 4”x4”.
- Run your fingers through your hair or across your forehead.
- Use that same hand to deposit fingerprints on the paper.
- Don’t worry if you can’t see the fingerprints!
- Place the paper inside the plastic container.
- Sprinkle 4-5 crystals of iodine in the bottom of the container and then close the lid.
- Hold the small container in your hand to add some heat to the experiment.
- You will begin to see the violet-colored fumes starting to appear.
- After several minutes the iodine fumes will adhere to the amino acids in your fingerprint secretions, leaving clear, brown fingerprints that were not previously visible.
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Education.com provides the Science Fair Project Ideas for informational purposes only. Education.com does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against Education.com that arise thereof. In addition, your access to Education.com's website and Science Fair Project Ideas is covered by Education.com's Privacy Policy and site Terms of Use, which include limitations on Education.com's liability.
Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.
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