CHESAPEAKE BAY DIVISION - IAI
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Ultra-Violet Light

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Development Color:
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Method to Record:
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Hazard:
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Protective Clothing: 
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 Fume Hood Use:
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Formula
Procedure of Application
Development Complete When
Source of Error
Incompatibilities
Precautions
Storage Container
Safety
Recommendations
Similar Reagent
Sequential Reagent
Formula
Used For:
A. Fluorescing fingerprint powders.
B. U-V sensitive dye stains.
C. Skin tissue examination.
D. Darkens blood impressions.
E. Fluorescing fluids for refrigerants, transmissions, fuels and coolants.
F. Luminesces backgrounds for contrast improvement.

Centered Wavelengths:
  1. SHORT - WAVE: 180 nm - 280 nm viewing. Oily, sweaty & contaminated ridge detail viewing. Luminol excitation.
  2. MEDUIM - WAVE:  280 nn to 320 nm viewing. Bruises, Bite marks, & Wounds viewing.
  3. LONG - WAVE:  320 nm to 400 nm viewing. Used for excitaion of dye stains Ardrox, Basic Yellow 40 & T.E.C. Fluoresces many natural and man-made substances.
Procedure of Application
  1. Wear UV-absorbing protective eyewear.
  2. Reduce ambient light.
  3. Aim the U-V light.
  4. Photograph detail using yellow or 2-A haze barrier fiters.






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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.



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Incompatibilities
Items that inherently luminescence in the ultra-violet region may interfere with dye stain contrast.












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











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Storage Container
Not applicable.














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Safety
Utra-violet light absorbing protective eyewear must be worn.

Short wavelength Ultra-violet light (180 nm - 280 nm) can cause severe burns to eyes and skin.









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Recommendations
Adjusting the wavelength (short, medium, or long wavelength) may produce better visualization results.












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Similar Reagent
  • Fluorescent Light
  • Visual Examination





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Sequential Reagent
​Not Necessarily in this Order:
  • Iodine Fuming
  • Electrostatic Lifting
  • Fluorescent Light
  • Visual Examination








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Chemical Name
Ultra-Violet Light

​Surface Used On
Non-Destructive for all surfaces
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Sensitive To
Absorption of UV Radiation
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Ridge Detail Visualized by:
Ultra Violet Light induced

Reagent Applicabilities:

Porous Surfaces
Non-Porous Surfaces
Non-Destructive

Other Chemical Name(s):
U.V. light
"Black Light"
"Sun Lamp"
Far Ultra-violet
Near Ultra-violet
Middle Ultra-violet
UV-A
UV-B
UV-C 

Process Summary:
A non-destructive technique to note the presence of visible detail. Several models of ultra-violet light sources are available that produce short-wave and long-wave (or both) lights. Detail is visualized either by turning darker upon absorbing ultra-violet light or by luminescing upon emitting ultra-violet light. Yellow or ultra-violet light blocking filters are used during photography of the detail. ​

Accepted Deviations:
Adjusting the wavelength of the ultra-violet light source may produce better visualization results. ​

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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  • Home
  • About Us
  • Membership
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  • Seminars
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  • Students
  • Resources
  • Vendors
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  • ACE-V Methodology