SUDAN BLACK

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Chemical Name:
SUDAN BLACK
Surface Used On:
Wet, Non-porous & grease-contaminated surfaces.
Sensitive To:
Sebaceous components.
Development Color: Method to Record: Hazard: Protective Clothing: Fume Hood Use:

Dark Blue.

Yes
Reagent Characteristics

Development Complete When:

Source of Error:

Incompatibilities:

Precautions:

Storage Container:

Safety:

Recommendations:


Similar Reagents



Sequential Reagents
(Not necessarily in this order.)



Abridged Reagent Sequence


Visual Examination
|
Forensic Light
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*** Sudan black ***
|
Forensic Light
|
Physical Developer

SUDAN BLACK FORMULA:
  15 g  Sudan black powder
dissolved in 
 
1000 ml Ethanol (or Methanol) 
add, then stir with 500 ml distilled water
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.
 


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


Working Solution Shelf-life:

Indefinite

Process Summary:

A dye stain technique used for the detection of the sebaceous component of fingerprint sweat. Sudan black is considered useful for the development of friction ridge detail deposited in contaminants such as grease, food residue, and dried deposits of sweetened beverages. As a sebaceous sensitive technique it can also be used on wetted items.

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.

7. Mitsui, T., Katho, H., Shimada, K., Wakasugi, Y., "Development of Latent Prints Using a Sudan Black B Solution", Ident. News, vol. 30, no. 8, 1980, pp. 9-10.

8. Mitsui, T., Katho, H., Shimada, K., Wakasugi, Y., "Development of Latent Prints Using a Sudan Black B Solution", Fingerprint Whorld, vol. 6, no. 24, 1981, pp. 84-85.

9. Stone, R. and Metzer, R., "A Comparison of Development Techniques Sudan Black B Solution/Black Magna Powder for Water-Soaked Porous Items", Ident. News, vol. 31, no. 1, 1981, pp. 13-14.



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