Chapter 19. Lab IV-2 Revealing Latent Fingerprints Using Iodine Fuming

Equipment and Materials

You’ll need the following items to complete this lab session. (The standard kit for this book, available from, includes the items listed in the first group.)

Materials from Kit

  • Goggles

  • Magnifier

  • Iodine crystals

Materials you Provide

  • Gloves

  • Iodine fuming chamber (see text)

  • Scanner and software (optional)

  • Starch water (see text)

  • Specimens: paper with latent fingerprints


Iodine crystals are toxic and corrosive and stain skin and clothing. (Stains can be removed with a solution made by dissolving a vitamin C tablet in water.) Iodine vapors are toxic and irritating. Perform this experiment only outdoors or in a well-ventilated area. ...

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