Practical No. 2
AIM:
TO DEVELOP AND IDENTIFY LATENT FINGERPRINTS.
MATERIAL REQUIRED:
1.
Sample
– Glass
2.
Ostrich
Brush
3.
Vermillion
(Sindoor)
4.
Coffee
Powder
5.
Transparent
Tape
6.
Fingerprint
Card (1-black Card & 1-white Card)
7.
Magnifying
Glass
8.
Pen
9.
Gloves
THEORY:
A Fingerprint Is An Impression Left
Behind By The Skin Found On The Inner Surface Of The Fingers. The Skin On This
Area Is Called Friction Ridge Skin And Is Found On The Palms Of The Hands, As
Well As On The Toes And Soles Of The Feet. They Have General Ridge Patterns,
Making It Possible To Systematically Classify Them. It Is An Individual
Characteristic; No Two Fingers Have Indentical Ridge Characteristic. An
Individual’s Fingerprint Remains Unchanged During The Entire Lifetime.
The Three Basic Pattern Types Are –
Arch, Loops And Whorls Are Sub Divided Into 9 Sub-types For The Purpose Of
Classification.
PRINCIPLE:
The patterns present on these fingertips
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:
- Wear Gloves And Carefully Handle The Sample Object.
- Align The Object 45 Degree To Your Eyes And Try To Locate Ridge Patterns On The Object. (Use Oblique Light If Available)
- Take Some Powder In The Brush And Softly Spread Or Dab The Powder On The Print.
- Once Print Developed, Open A Clear Tape About 2 Inches More Than The Height Of The Print Both Above And Below The Clear Area For The Print.
- Carefully Place The Tape On The Print And Press Lightly.
- In One Lift Pull Out The Entire Print Area Of The Tape.
- Now Take A Fingerprint Card And Carefully Paste The Tape On The Card Such That The Print Is In The Center.
- Examine The Developed The Prints With The Help Of A Magnifying Glass.
- Identify The Pattern Present.
OBSERVATIONS:
SAMPLE
|
SURFACE
|
POWDER
|
FINGERPRINT
CARD
|
OBSERVATION
|
PATTERN
OBSERVED
|
1.
|
GLASS
|
VERMILLION
(SINDOOR)
|
WHITE CARD
|
|
LOOP
|
2.
|
GLASS
|
COFFEE POWDER
|
WHITE CARD
|
|
WHORL
|
FORENSIC SIGNIFICANCE:
1.
Fingerprints
are commonly found on the crime scenes.
2.
They
can be easily lifted and developed.
3.
These
have potential individual characteristic to identify people.
4.
Proper
database is present for biometric matching, aadhar card records fingerprint
data in india. Also commonly found in offices and universities.
PRECAUTIONS:
1.
Do
not put exccesive powder on the print.
2.
Use
soft bristle brush and do not rub the brush over the print.
3.
Always
wear gloves while using the powders.
RESULT:
The Fingerprints
Present Were Developed & Patterns Were Identified.
Sample -1 Has
Loop Pattern.
Sample -2 Has
Whorl Pattern.
Written & Presented By:-
Ms DIKSHA MEHRA
Member of AFRS
