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IAI Latent Print Certification Test Questions
and Correct Answers
What sequence of latent print development techniques are used to
develop prints from porous materials? Ans: DFO, Ninhydrin,
Physical Developer
The final purple coloured compound usually produced with the
treatment of Ninhydrin Ans: Ruhemann's Purple
What latent print development technique is used to process
nonporous materials that are wet? Ans: Small Particle Reagent
A dye which stains protein present in blood to give a blue-black
product Ans: Amido Black
The following types of fingerprints will fluoresce under
appropriate illumination Ans: 1. Natural latent fingerprints
2. Some types of contamination arising from the environment and
subsequently deposited in fingerprints
May be one of the first processes used in a sequence of a
fingerprint examination Ans: Fluorescence examination
Gentian violet is a dye which stains fatty constituents of sebaceous
sweat producing an intense purple image. It is very effective for
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the development of latent fingerprints on... Ans: Adhesive surface
of adhesive tapes
Alternative process names for Gentian Violet Ans: 1. Crystal
Violet
2. Methyl Violet
Alternative process name for Amido Black Ans: Naphthalene Black
Iodine vapour is physically absorbed by latent fingerprint deposits
and often fades unless fixed. What color image is formed using
iodine vapour? Ans: Brown
Gentian Violet can interfere with the forensic examination for:
Ans: 1. Handwriting
2. Body fluids
3. Ink
Ninhydrin is a general purpose fingerprint reagent for paper and
some other porous surfaces. What component of a fingerprint
deposit does it react with? Ans: Amino Acids
How long does it generally take for Ninhydrin treated prints to
naturally, fully develop Ans: Several weeks
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The development of Ninhydrin treated prints may be accelerated
with the use of? Ans: Heating and Humidification
Ninhydrin which uses a Freon solvent virtually eliminates the
following problem when processing porous materials for latent
prints? Ans: Ink running
Ninhydrin may be applied using what methods? Ans: 1. Dipping
2. Brushing
3. Spraying
Physical Developer (PD) is what kind of aqueous reagent? Ans:
Silver-based
Physical Developer reacts with components of sebaceous sweat to
form what colored deposit? Ans: Grey-silver
Physical Developer is a very effective reagent for developing latent
fingerprints on paper which has been: Ans: Wetted
These flake powders have been shown to be more sensitive than
most other types of powders Ans: Aluminum
Which latent print development technique was replaced by the
Ninhydrin/Physical Developer combination for treating porous
materials for latent prints? Ans: Silver Nitrate
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Silver Nitrate reacts with what component present in fingerprint
deposits? Ans: Chlorides
Small Particel Reagent (SPR) is a latent print development
technique that may be used on all non-porous surfaces including
those which are ... Ans: Wet
What does Small Particle Reagent adheres to in the fingerprint
deposit? Ans: Fats
Small Particle Reagent is comprised of what fine particles? Ans:
Molybdenum Disulphide
Small Particle Reagent forms what color deposit? Ans: Grey, also
white and black
The best latent print development technique for use on non-
porous surfaces which are contaminated with grease, foodstuffs,
or dried deposits of soft drinks Ans: Sudan Black
An alternative process name for superglue Ans: Cyanoacrylate
Superglue polymersises on some latent fingerprints to produce
what colored deposit? Ans: White
Superglue is thought to react primarily with what component in
the latent print deposit? Ans: Water
© 2025 All rights reserved
IAI Latent Print Certification Test Questions
and Correct Answers
What sequence of latent print development techniques are used to
develop prints from porous materials? Ans: DFO, Ninhydrin,
Physical Developer
The final purple coloured compound usually produced with the
treatment of Ninhydrin Ans: Ruhemann's Purple
What latent print development technique is used to process
nonporous materials that are wet? Ans: Small Particle Reagent
A dye which stains protein present in blood to give a blue-black
product Ans: Amido Black
The following types of fingerprints will fluoresce under
appropriate illumination Ans: 1. Natural latent fingerprints
2. Some types of contamination arising from the environment and
subsequently deposited in fingerprints
May be one of the first processes used in a sequence of a
fingerprint examination Ans: Fluorescence examination
Gentian violet is a dye which stains fatty constituents of sebaceous
sweat producing an intense purple image. It is very effective for
© 2025 All rights reserved
, 2 | Page
the development of latent fingerprints on... Ans: Adhesive surface
of adhesive tapes
Alternative process names for Gentian Violet Ans: 1. Crystal
Violet
2. Methyl Violet
Alternative process name for Amido Black Ans: Naphthalene Black
Iodine vapour is physically absorbed by latent fingerprint deposits
and often fades unless fixed. What color image is formed using
iodine vapour? Ans: Brown
Gentian Violet can interfere with the forensic examination for:
Ans: 1. Handwriting
2. Body fluids
3. Ink
Ninhydrin is a general purpose fingerprint reagent for paper and
some other porous surfaces. What component of a fingerprint
deposit does it react with? Ans: Amino Acids
How long does it generally take for Ninhydrin treated prints to
naturally, fully develop Ans: Several weeks
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, 3 | Page
The development of Ninhydrin treated prints may be accelerated
with the use of? Ans: Heating and Humidification
Ninhydrin which uses a Freon solvent virtually eliminates the
following problem when processing porous materials for latent
prints? Ans: Ink running
Ninhydrin may be applied using what methods? Ans: 1. Dipping
2. Brushing
3. Spraying
Physical Developer (PD) is what kind of aqueous reagent? Ans:
Silver-based
Physical Developer reacts with components of sebaceous sweat to
form what colored deposit? Ans: Grey-silver
Physical Developer is a very effective reagent for developing latent
fingerprints on paper which has been: Ans: Wetted
These flake powders have been shown to be more sensitive than
most other types of powders Ans: Aluminum
Which latent print development technique was replaced by the
Ninhydrin/Physical Developer combination for treating porous
materials for latent prints? Ans: Silver Nitrate
© 2025 All rights reserved
, 4 | Page
Silver Nitrate reacts with what component present in fingerprint
deposits? Ans: Chlorides
Small Particel Reagent (SPR) is a latent print development
technique that may be used on all non-porous surfaces including
those which are ... Ans: Wet
What does Small Particle Reagent adheres to in the fingerprint
deposit? Ans: Fats
Small Particle Reagent is comprised of what fine particles? Ans:
Molybdenum Disulphide
Small Particle Reagent forms what color deposit? Ans: Grey, also
white and black
The best latent print development technique for use on non-
porous surfaces which are contaminated with grease, foodstuffs,
or dried deposits of soft drinks Ans: Sudan Black
An alternative process name for superglue Ans: Cyanoacrylate
Superglue polymersises on some latent fingerprints to produce
what colored deposit? Ans: White
Superglue is thought to react primarily with what component in
the latent print deposit? Ans: Water
© 2025 All rights reserved
