CHESAPEAKE BAY DIVISION - IAI
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Sudan Black

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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 Reagents
Formula
15 g Sudan black powder dissolved in 1000 ml Ethanol add, then stir with 500 ml distilled water



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Procedure of Application
  1. Immerse in Working solution for 2 minutes.
  2. Cold Tap water rinse - remove excess dye.
  3. Dry item at room temperature.





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Development Complete When
Dark blue-stained ridge detail is revealed upon a tap water rinse and the item allowed to air-dry.

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Source of Error
This reagent is considered to be a low-sensitive technique for 'natural' latent print ridge detail.

Some source of contaminant such as grease or other dried residue is required as a target to which this reagent can bind.
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Incompatibilities
Porous items which absorb the reagent, and dark colored items.

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Precautions
This is considered to be a messy technique.

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Storage Container
Dark or Clear stoppered glass bottles.

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Safety
No known health hazards.

Use in a well-ventilated area.
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Recommendations
Useful for those wetted items whose surfaces are contaminated with substances such as grease, beverages and food-stuffs.

Useful for post-cyanoacrylate staining on the inside of latex gloves.



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Similar Reagent
  • Physical Developer
  • Small Particle Reagent

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Sequential Reagents
  • Physical Developer
  • Small Particle Reagent

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Chemical Name
Sudan Black
​Surface Used On
Wet, Non-Porous & Grease-Contaminated Surfaces
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Sensitive To
Sebaceous Components
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Abridged Reagent Sequence
  1. Visual Examination
  2. Forensic Light
  3. Sudan Black
  4. Forensic Light​​
  5. Physical Developer
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Ridge Detail Visualized by:
Visible chemical/stain reaction​

​​Reagent Applicabilities:
Residue-contaminated items
Water-soaked items
Non-Porous sufaces
Post-Cyanoacrylate

Other Chemical Name(s):

Solvent black 3
SSB

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Working Solution Shelf-life:
Indefinite

Process Summary:
A dye stain technique for use on wet items, it is considered less sensitive than other wet item techniques in use. Sudan black is considered useful for those wet items whose surfaces are contaminated with substances such as grease, beverages and food-stuffs. 

Accepted Deviations:
May be used as a post-cyanoacrylate developer, and is especially useful for post-cyanoacrylate staining on the inside of latex gloves. ​

Supporting Reference Materials:
  1. Stone, R.S., & Metzger, R.A., "Comparison of Development Techniques for Water Soaked Porous Items-Sudan Black Solution / Magna Powder", Identification News, Jan 1981, pp. 13.
  2. Minutiae Magazine, Summer Special 1994, Issue No. 24, pg.7.
  3. "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994.
  4. Advances in Fingeprint Technology 2nd. Ed., Lee, H.C. & Gaensslen, R.E., CRC Press, Boca Raton, FL., 2001.
  5. Manual of Fingerprint Development Techniques 2nd. Ed., Home Office - Police Scientific Development Branch, White Crescent Press, Ltd., Luton, England, 2001.
  6. Technical Notes, Lightning Powder Co. Inc., Salem, OR., 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