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Irregular Surfaces Fingerprinting Lab

Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Irregular Surfaces Fingerprinting Lab
Product Description
Meant to follow my "Dusting for Prints" lab (but not necessary), in my irregular surfaces lab students will be working on their own to develop prints they make on the sticky side of duct tape, on paper using iodine, on cardboard using ninhydrin, on woodchips using silver nitrate, and on a plastic page protector or overhead transparency using superglue (cyanoacrylate).

I wrote this lab the first year I started my forensics class and had no budget, so most materials, besides perhaps ninhydrin and the candle warmer, are easily accessible and should be on most high school campuses. While it takes a fair amount of setup, the students have a GREAT time and it's well worth it!

Includes materials list, safety considerations, tips on getting and making materials, and an answer key for the questions at the end of the lab. Requires 2 90-minute periods.

Materials needed but not included:
 Fingerprint powder or fine ground charcoal
 Fingerprint dusting brush or makeup blush brush
 Water
 Dish soap
 Beaker
 3 Pipettes
 Duct Tape
 Fume Hood
 Forceps
 Liquid Iodine
 Large Test Tube
 Rubber Stopper
 Hot water bath
 Wood chips (1 per student, available from your school's wood shop)
 Silver Nitrate in a Spray Bottle
 Water Bath
 UV Light source (or window, or students may go outside.
 Sharpie
 Large Cardboard box
 Scissors
 Ninhydrin solution in Spray Bottle
 Acetone in Spray Bottle
 Paper towel or cloth
 Iron
 Access to outdoors
o Cardboard box with lid (like paper comes in)
o Page protector or overhead transparency
o Candle warmer
o Tape
 Overhead transparencies or sheet protector (1 per student)
 50mL beaker of water
 6” aluminum foil
 Superglue
 Box tape
 Copies of lab (1 per student)
Total Pages
N/A
Answer Key
Included
Teaching Duration
2 days
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