CHESAPEAKE BAY DIVISION - IAI
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Visual Examination

Back to Start

Development Color:
Picture
Vertical Divider
Method to Record:
Picture
Vertical Divider
Hazard:
Picture
Vertical Divider
Protective Clothing: 
Picture
Vertical Divider
 Fume Hood Use:
Picture

Formula
Procedure of Application
Development Complete When
Source of Error
Incompatibilities
Precautions
Storage Container
Safety
Recommendations
Similar Reagent
Sequential Reagent
Formula
Not Applicable













​
Procedure of Application
A. Simple ambient light.
B. Absorbed light (filter out background color).
C. Reflected light. (for greasy impressions).
D. Oblique light (for dust impressions).
E. Transmitted light (on transparent surfaces).
F. Directed light (to subdue surface texture). 





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​

​
Development Complete When
All the item's surfaces have been examined.





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​
Source of Error
Handing items (by handles) in their normal manner may obliterate or smudge visible detail.



​








​
Incompatibilities
Not applicable.












​
Precautions
Ascertain that items do not have liquid or loose components that may spill if the item is subjected to maneuvering.











​
Storage Container
Not applicable.














​
Safety
Beware of sharp corners and pointed items, or, contents that may spill. 










​

​
Recommendations
Adjusting the source, angle, and illumination intensity may produce better visualization results.












​
Similar Reagent
  • Fluorescent Light
  • Ultra-Violet Light





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​





​
Sequential Reagent
​Not Necessarily in this Order:
  • Iodine Fuming
  • Electrostatic Lifting
  • Fluorescent Light
  • Ultra-Violet Light








​
Vertical Divider
Chemical Name
Visual Examination

​Surface Used On
Non-Destructive for all surfaces
​
​
Sensitive To
Reflected & Absorbed Lighting
​
Vertical Divider
Ridge Detail Visualized by:
Visible Stain

Reagent Applicabilities:
Porous Surfaces
Non-Porous Surfaces

Other Chemical Name(s):
Ambient light
Natural light
Absorbed light
Reflected light
Directed light
Oblique light
Transmitted light

Process Summary:
A non-destructive technique to note the presence of visible detail. Several natural and artificial sources, and angles of light may be utilized in order to best visualize any detail that is present. ​

Accepted Deviations:
Adjusting the source, angle, and illumination intensity may produce better visualization results. Numerous lamps, colored filters, fiber optic guides, liquid light guides and forensic light sources can be utilized. ​

Supporting Reference Materials:
  1. Advances in Fingeprint Technology 2nd. Ed., Lee, H.C. & Gaensslen, R.E., CRC Press, Boca Raton, FL., 2001.
  2. Manual of Fingerprint Development Techniques 2nd. Ed., Home Office - Police Scientific Development Branch, White Crescent Press, Ltd., Luton, England, 2001.

Address
Chesapeake Bay Division - International Association for Identification   

P.O. Box 71804, 
Henrico, VA 23255
Email
cbdiaisec@gmail.com
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  • ACE-V Methodology