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Fingerprinting (Dactylograph)

Producing Fingerprint Patterns
Materials:
Ink pad
Black ink
Large unlined index card index card with drawing of the right hand
Large unlined index card with drawing of the left hand

Procedeure:
Method #1
1. Roll your right thumb in the black ink pad.
2. Roll the ink covered fingertip onto the appropriate space provided 
for the right thumb on the index card of the right hand.
Note: Thumbs are rolled to the body. 
3. Roll your pointer finger in the black ink pad.
4. Roll the ink covered fingertip onto the appropriate space provided 
on the index card.
Note: All fingers with the exception of thumbs are rolled away from
the body.
5. Repeat steps 1 - 3 with all fingers of the right hand and left hand.

Method #2
1. Rub the point of a #2 pencil on an unlined index card.
2. Roll your right thumb in the graphite.
3. Place a piece of cellophane tape sticky side up on your table.
4. Place your right thumb coated with graphite on the tape.
5. Carefully remove the tape to lift your fingerprint off your finger.
6. Stick the tape on to the appropriate space provided on an unlined 
index card.

Examination of Fingerprint Patterns
1. Examine your fingerprints with a hand lens.
2. Identify the loops, whorls and arches.

Latent Fingerprints
Latent fingerprints are invisible prints caused by the transfer of body perspiration or oils present on finger ridges to the surface of an object. Latent prints on hard, non- absorbent surfaces are developed by the light application of powders with a brush. The powders readily adhere to perspiration residues and / or deposits of body oils left on the surface. Black powders are applied to white or light - colored surfaces. White powders are applied to black or dark - colored surfaces.

Lifting Latent Fingerprints Materials:
Watercolor brush
Plastic drinking glass
Dusting powders - Black and White
Cellophane tape
White unlined index cards
Plastic scissors

Procedure:
1. Gently dust in the area of the glass where latent prints are expected to be.
2. When the latent print becomes visible, cut a 5 cm piece of scotch tape
and carefully pass the tape over the colored print.
3. Carefully remove the tape off the surface of the cup and press the tape with the visible print onto a white unlined index card.
4. Observe the print.
5. Categorize the print. (Loops, Whorls, Arches)