IAI LATENT PRINT EXAMINER
CERTIFICATION PREP 2025
What sequence of latent print development techniques are used to develop prints from
porous materials? - ANSWER- DFO, Ninhydrin, Physical Developer
The final purple colored compound usually produced with the treatment of Ninydrin is
called: - ANSWER- Ruhemann's Purple
What latent print development technique is used to process nonporous materials that
are wet? - ANSWER- Small Particle Reagent
A dye which stains protein present in blood to give a blue-black product - ANSWER-
Amido Black
The following types of fingerprints will fluoresce under the appropriate illumination: -
ANSWER- - Natural latent prints
- Some types of contamination arising from the environment & subsequently deposited
in fingerprints
Gentian Violet is a dye which stains fatty constituents of sebaceous sweat, producing an
intense purple image. It is very effective for the development of latent fingerprints on: -
ANSWER- Adhesive surfaces
Alternate process name(s) for Gentian Violet - ANSWER- - Crystal Violet
- Methyl Violet
Alternative process name for Amido Black - ANSWER- Naphthalene Black
Iodine vapor is physically absorbed by latent fingerprint deposits & often fades unless
fixed. What color image is formed using iodine vapor? - ANSWER- Brown
Gentian Violet can interfere with the forensic examination of: - ANSWER- - Handwriting
- Body fluids
- Ink
Ninhydrin is a general purpose fingerprint reagent for paper & some other porous
surfaces. What component of a fingerprint deposit does it react with? - ANSWER-
Amino Acids
,How long does it generally take for ninhydrin treated prints to fully develop naturally? -
ANSWER- Several weeks
The development of Ninhydrin treated prints may be accelerated with the use of: -
ANSWER- Heating & Humidification
Ninhydrin, which uses a Freon solvent, virtually eliminates the following problem when
processing porous materials for latent prints? - ANSWER- Ink running
Ninhydrin may be applied using the following methods: - ANSWER- - Dipping
- Brushing
- Spraying
Physical Developer (PD) is what kind of aqueous reagent? - ANSWER- Silver-based
Physical Developer reacts with components of sebaceous sweat to form what colored
deposit? - ANSWER- Grey-Silver
Physical Developer is a very effective reagent for developing latent fingerprints on paper
which has been: - ANSWER- wetted
These ___ flake powders have been shown to be more sensitive than most other types
of powders: - ANSWER- Aluminum
Which latent print development technique was replaced by the Ninhydrin/ Physical
Developer combination for treating porous materials for latent prints? - ANSWER- Silver
Nitrate
Silver Nitrate reacts with what component present in fingerprint deposits? - ANSWER-
Chlorides
Small Particle Reagents (SPR) is a latent print development technique that may be
used on all non-porous surfaces including those which are: - ANSWER- Wet
What does Small Particle Reagent adhere to in the fingerprint deposit? - ANSWER-
Fats
Small Particle Reagent is comprised of what fine particles? - ANSWER- Molybdenum
Disulphide
,Small Particle Reagent forms what color deposit? - ANSWER- Grey
The best latent print development technique for non-porous surfaces which are
contaminated with grease, food or dried deposits of soft drinks is? - ANSWER- Sudan
Black
An alternate process name for superglue is: - ANSWER- Cyanoacrylate
Superglue polmerises on some latent fingerprints to produce what colored deposit? -
ANSWER- White
Superglue is thought to react primarily with what component in the latent print deposit? -
ANSWER- Water
Superglue is most suitable for what kinds of surfaces? - ANSWER- Non-porous
Vacuum Metal Deposition utilizes vacuum-coating technology for the evaporation of
metals & the deposition of thin metal films. Thin layers of what metal is used for this
process? - ANSWER- Gold & Zinc
Vacuum Metal Deposition is particularly suitable on what surfaces: - ANSWER-
Polythene Plastic
This fingerprint development technique reacts more intensely with older fingerprints
thereby making it possible to determine the relative age of a latent print: - ANSWER- It
is impossible to determine the age of a fingerprint by observation of it's reaction with a
fingerprint detection process.
___ was employed at the Central Police Department at La Plata, Argentina & installed
the French Bertillon Anthropometric Identification System. - ANSWER- Juan Vucetich
In 1892 who contributed to the the first murder solved by fingerprints (Rojas Murder,
Argentina)? - ANSWER- Juan Vucetich
A fingerprint classification without whorls would be: - ANSWER- 1/1
A fingerprint classification with all whorls would be: - ANSWER- 32/32
, The initial suggestion associating the identification of fingerprints found at crime scenes
with fingerprint impressions in a collection is credited to: - ANSWER- Dr. Henry Faulds
___ was credited for his practical interest in fingerprints in India as a means of
identifying workers to ensure that payment of wages was not duplicated: - ANSWER-
Sir Edward Henry
The first person to confirm ridge permanency was: - ANSWER- Sir William Herschel
This person is known as the "Father of Canadian Fingerprinting" - ANSWER- Edward
Foster
The first american fingerprint lecturer was: - ANSWER- Mary Holland
The use of magnetic fingerprinting was first reported by: - ANSWER- H. MacDonald
In 1982, the U.S. Army Criminal Investigation Laboratory in Japan introduced which
novel procedure for processing evidence for latent prints? - ANSWER- Superglue
___ reacts with amino acids in the fingerprint deposit: - ANSWER- Ninhydrin
Freon 113 (trichlorotirfluoroethane) is a solvent that has been used to produce: -
ANSWER- Ninhydrin
An alternative name for "1,8-diazafluoren-9-one" is: - ANSWER- DFO
Who reported the use of DFO for the fluorescent detection of latent prints on paper? -
ANSWER- Pounds
A photographic process that is based on the formation of silver and a ferrous/ ferric
redox couple and the deposition of metal salts onto a fingerprint image: - ANSWER-
Physical Developer
These reagents have been reported to work very successfully in the enhancement of
bloody fingerprints: - ANSWER- - Coomassie Blue
- Amido Black
This method (s) has been suggested for the visualization & recovery of latent
fingerprints on human skin: - ANSWER- - Magnetic powder
- Iodine-silver plate transfer
CERTIFICATION PREP 2025
What sequence of latent print development techniques are used to develop prints from
porous materials? - ANSWER- DFO, Ninhydrin, Physical Developer
The final purple colored compound usually produced with the treatment of Ninydrin is
called: - ANSWER- Ruhemann's Purple
What latent print development technique is used to process nonporous materials that
are wet? - ANSWER- Small Particle Reagent
A dye which stains protein present in blood to give a blue-black product - ANSWER-
Amido Black
The following types of fingerprints will fluoresce under the appropriate illumination: -
ANSWER- - Natural latent prints
- Some types of contamination arising from the environment & subsequently deposited
in fingerprints
Gentian Violet is a dye which stains fatty constituents of sebaceous sweat, producing an
intense purple image. It is very effective for the development of latent fingerprints on: -
ANSWER- Adhesive surfaces
Alternate process name(s) for Gentian Violet - ANSWER- - Crystal Violet
- Methyl Violet
Alternative process name for Amido Black - ANSWER- Naphthalene Black
Iodine vapor is physically absorbed by latent fingerprint deposits & often fades unless
fixed. What color image is formed using iodine vapor? - ANSWER- Brown
Gentian Violet can interfere with the forensic examination of: - ANSWER- - Handwriting
- Body fluids
- Ink
Ninhydrin is a general purpose fingerprint reagent for paper & some other porous
surfaces. What component of a fingerprint deposit does it react with? - ANSWER-
Amino Acids
,How long does it generally take for ninhydrin treated prints to fully develop naturally? -
ANSWER- Several weeks
The development of Ninhydrin treated prints may be accelerated with the use of: -
ANSWER- Heating & Humidification
Ninhydrin, which uses a Freon solvent, virtually eliminates the following problem when
processing porous materials for latent prints? - ANSWER- Ink running
Ninhydrin may be applied using the following methods: - ANSWER- - Dipping
- Brushing
- Spraying
Physical Developer (PD) is what kind of aqueous reagent? - ANSWER- Silver-based
Physical Developer reacts with components of sebaceous sweat to form what colored
deposit? - ANSWER- Grey-Silver
Physical Developer is a very effective reagent for developing latent fingerprints on paper
which has been: - ANSWER- wetted
These ___ flake powders have been shown to be more sensitive than most other types
of powders: - ANSWER- Aluminum
Which latent print development technique was replaced by the Ninhydrin/ Physical
Developer combination for treating porous materials for latent prints? - ANSWER- Silver
Nitrate
Silver Nitrate reacts with what component present in fingerprint deposits? - ANSWER-
Chlorides
Small Particle Reagents (SPR) is a latent print development technique that may be
used on all non-porous surfaces including those which are: - ANSWER- Wet
What does Small Particle Reagent adhere to in the fingerprint deposit? - ANSWER-
Fats
Small Particle Reagent is comprised of what fine particles? - ANSWER- Molybdenum
Disulphide
,Small Particle Reagent forms what color deposit? - ANSWER- Grey
The best latent print development technique for non-porous surfaces which are
contaminated with grease, food or dried deposits of soft drinks is? - ANSWER- Sudan
Black
An alternate process name for superglue is: - ANSWER- Cyanoacrylate
Superglue polmerises on some latent fingerprints to produce what colored deposit? -
ANSWER- White
Superglue is thought to react primarily with what component in the latent print deposit? -
ANSWER- Water
Superglue is most suitable for what kinds of surfaces? - ANSWER- Non-porous
Vacuum Metal Deposition utilizes vacuum-coating technology for the evaporation of
metals & the deposition of thin metal films. Thin layers of what metal is used for this
process? - ANSWER- Gold & Zinc
Vacuum Metal Deposition is particularly suitable on what surfaces: - ANSWER-
Polythene Plastic
This fingerprint development technique reacts more intensely with older fingerprints
thereby making it possible to determine the relative age of a latent print: - ANSWER- It
is impossible to determine the age of a fingerprint by observation of it's reaction with a
fingerprint detection process.
___ was employed at the Central Police Department at La Plata, Argentina & installed
the French Bertillon Anthropometric Identification System. - ANSWER- Juan Vucetich
In 1892 who contributed to the the first murder solved by fingerprints (Rojas Murder,
Argentina)? - ANSWER- Juan Vucetich
A fingerprint classification without whorls would be: - ANSWER- 1/1
A fingerprint classification with all whorls would be: - ANSWER- 32/32
, The initial suggestion associating the identification of fingerprints found at crime scenes
with fingerprint impressions in a collection is credited to: - ANSWER- Dr. Henry Faulds
___ was credited for his practical interest in fingerprints in India as a means of
identifying workers to ensure that payment of wages was not duplicated: - ANSWER-
Sir Edward Henry
The first person to confirm ridge permanency was: - ANSWER- Sir William Herschel
This person is known as the "Father of Canadian Fingerprinting" - ANSWER- Edward
Foster
The first american fingerprint lecturer was: - ANSWER- Mary Holland
The use of magnetic fingerprinting was first reported by: - ANSWER- H. MacDonald
In 1982, the U.S. Army Criminal Investigation Laboratory in Japan introduced which
novel procedure for processing evidence for latent prints? - ANSWER- Superglue
___ reacts with amino acids in the fingerprint deposit: - ANSWER- Ninhydrin
Freon 113 (trichlorotirfluoroethane) is a solvent that has been used to produce: -
ANSWER- Ninhydrin
An alternative name for "1,8-diazafluoren-9-one" is: - ANSWER- DFO
Who reported the use of DFO for the fluorescent detection of latent prints on paper? -
ANSWER- Pounds
A photographic process that is based on the formation of silver and a ferrous/ ferric
redox couple and the deposition of metal salts onto a fingerprint image: - ANSWER-
Physical Developer
These reagents have been reported to work very successfully in the enhancement of
bloody fingerprints: - ANSWER- - Coomassie Blue
- Amido Black
This method (s) has been suggested for the visualization & recovery of latent
fingerprints on human skin: - ANSWER- - Magnetic powder
- Iodine-silver plate transfer
