Aim: To develop Latent Fingerprint using Powder Method
Requirements: Fingerprint Powder, Brush, Surface (Glass Slab)
Theory:
Latent prints are invisible impressions left on objects by a person's fingers and palms due to sweat secretions. These prints are concealed to the naked eye. Sweat pores in the friction skin of hands and feet release sweat, creating these latent fingerprints when in contact with smooth surfaces. Increased sweating, often during moments of nervousness or excitement, makes these prints more prominent.
To make latent prints visible, forensic experts use fingerprint powders and chemical solutions, allowing for photography, preservation, and use in identification and court proceedings. The permanency and unique distribution of ridge characteristics on fingers and palms make each person's fingerprints distinct, except for prints from the same finger of the same person.
A minimum of eight matching ridge characteristics is typically required to establish a positive identity in fingerprint examination. However, even more ridge characteristics can be used for identification if the print is clear.
Procedure:
1. Fingerprint developing Powder is taken
2. With the help of Brush Powder is Sprinkled over the Surface on which Print is to be developed
3. Sprinkled Powder is Spread evenly and the excess is wiped off using the Brush
4. The Developed Print is then Preserved using a Cellophane Tape
Result:
The Latent Print on the given Surface is developed using fingerprint developing Powder
Precautions:
1. Do not Over sprinkle the Powder
2. Do not touch the Surface where fingerprints are supposed to Develop
3. Handle the Brush Gently during development of Fingerprint
