Practical – 01
Aim: To develop and identify lip prints.
Material required:
1. Blank white sheet
2. Fluorescent powder
3. Brush
4. Gloves
5. Magnifying glass
6. Sample – “lips”
Theory:
The study of lip prints is called cheiloscopy. It deals with the unique patterns present on the lips. Human lips, are the soft, pinkish, moveable tissue present on the face. It act as a tactile sensory organ with no sweat glands present on it. The outline of the lips is called the vermillion border while the inner region is the vermillion zone. On this zone, the patterns are present.
In, 1902 an anthropologist named R. Fischer were the first to identify these patterns on the lips and called them, “arrangement of furrows”. Later in 1932, Edmond Locard used lip prints as a means of personal identification.
Principle:
The patterns present on these lips are unique to every individual. These patterns can be classified in order to develop class characteristics in the pattern. As well as individual characteristics can also be examined.
Procedure:
1. Clean the lips of the person whose samples are to be TAKEN. Let them dry at room temperature.
2. Take a white paper of about 15cm*8cm. fold the paper INTO half horizontally.
3. Now place this paper from fold side in between the lips of the person.
4. Ask the person to slowly close the lips and let them completely fall on the paper, without moving.
5. After 30 seconds, let the person open his lips softly just apart. Now remove the paper and unfold it on a board.
6. Let the prints at room temperature in shade.
7. Once dried, take some fluorescent powder by the brush and lightly tap on the prints. With a soft ostrich brush one can spread powder in contact with the print on the paper surface.
8. Examine the developed the prints with the help of a magnifying glass.
9. Identify the pattern present.
Lip Print Types:
In 1960-67, Dr. Santoz gave the first classification of lip prints –
|
S.NO. |
PATTERN OBSERVED |
PATTERN NAME |
|
1. |
__________________ |
STRAIGHT LINE |
|
2. |
 |
CURVED LINE |
|
3. |
 |
ANGLED LINE |
|
4. |
~~~~~~~~~~~~~ |
SINE SHAPED |
In 1971, Suzuki Ans Tsuchihashi gave another classification for lip prints. This classification is used till now.
Observation:
The lip patterns were observed.
Pattern – few longitudinal incomplete straight lines.
Forensic Significance:
1. Lip prints are commonly found on the crime scenes for crimes such as sexual assault, rape, death by poison, kidnapping etc.
2. They can be easily lifted and developed.
3. These have potential individual characteristic to identify people.
Precautions:
1. Avoid excessive moisture on lips while taking samples.
2. Do not pull the paper swiftly from the lips.
3. Florescent powders are carcinogenic in nature hence, use gloves and mask.
Result:
The pattern identified is Type 1’.
Terms & Conditions:
1. This pdf is only for practical purposes.
2. The pdf does not support any academic usage.
3. The content must not be copy-pasted anywhere.
4. The content is involved only for theoretical and practical knowledge.ons:
Written & Presented By:-
Diksha Mehra
Member of AFRS
