1.Latent fingerprints- the word latent means hidden or invisible. for forensic science the term latent prints means any chance or accidental impression left by friction ridge skin on a surface, regardless of whether it is visible or invisible at the time of deposition. Electronic, chemical & physical processing techniques permit the visualization of latent print residue. 2.Physical methods of developing latent prints- Light Laser Powder Vacuum Coating X-ray Iodine Fuming Turmeric powder 3.Advantages of powder method- The powder method is inexpensive and has less substrate painting. Magnetic powder are easy to clean and can be used on both porous and non-porous surfaces.These methods are used for developing prints on wet surfaces because organic residues are insoluble in water so the physical developer can detect latent impressions. They are non destructive in nature. They are used when ninhydrin and iodine fail to work. 4.light method- Oblique lighting method-3 laser lights are used- UV Rays- gives print of violet color. IR Rays- gives print of red color. Laser – gives print of orange color. They are used to find prints over large areas.UV lights and lasers make fingerprints fluoresce and will reveal more prints than regular flashlights. 5.Iodine fuming-Iodine fuming is used to reveal prints on porous and semiporous surfaces both. It is one of the easiest methods, inexpensive and non-destruvtive process. 6.Vaccum coating -Vaccum coating or vaccum metal deposition is a mixture of zinc, antimony and copper powder give excellent results on non-porous substrates of latent prints.It develops marks on substrates exposed to water and conditions of humidity. 7. turmeric powder-Turmeric (Curcuma longa) is a rhizomatous herbaceous perennial plant of the ginger family Zingiberaceae .The authors in this communication has attempted to develop a new technique using turmeric powder, a condiment commonly used in Indian food, for the development of latent fingerprints present on different surfaces which has not been reported so far It is best method as it is non-destructive, inexpensive and can be available easily.

2. the word latent means hidden or invisible.
for forensic science the term latent prints means
any chance or accidental impression left by friction
ridge skin on a surface, regardless of whether it is
visible or invisible at the time of deposition.
Electronic, chemical & physical
processing techniques permit the
visualization of latent print residue.

3. 1. Light
2. Laser
3. Powder
4. Vacuum Coating
5. X-ray
6. Iodine Fuming
7. Turmeric powder

4. ADVANTAGES OF PHYSICAL METHODS
•The powder method is inexpensive and has less
substrate painting.
•Magnetic powder are easy to clean and can be used
on both porous and non-porous surfaces.

5. • These methods are used for developing prints on
wet surfaces because organic residues are insoluble
in water so the physical developer can detect latent
impressions.
• They are non destructive in nature.
• They ae used when ninhydrin and iodine fail to
work.

6. • Oblique lighting method-3 laser lights are used-
UV Rays- gives print of violet color.
IR Rays- gives print of red color.
Laser – gives print of orange color.
They are used to find prints over large areas.UV lights
and lasers make fingerprints fluoresce and will
reveal more prints than regular flashlights.

7. • Iodine fuming is used to reveal prints on porous and
semiporous surfaces both. It is one of the easiest
methods, inexpensive and non-destruvtive process.
• Vaccum coating or vaccum metal deposition is a
mixture of zinc, antimony and copper powder give
excellent results on non-porous substrates of latent
prints.It develops marks on substrates exposed to
water and conditions of humidity.

8. •Turmeric (Curcuma longa) is a rhizomatous herbaceous
perennial plant of the ginger family Zingiberaceae
•.The authors in this communication has attempted to develop a
new technique using turmeric powder, a condiment commonly
used in Indian food, for the development of latent fingerprints
present on different surfaces which has not been reported so far
•It is best method as it is non-destructive, inexpensive and can be
available easily.