|
Development Color:
Vertical Divider
|
Method to Record:
Vertical Divider
|
Hazard:
Vertical Divider
|
Protective Clothing:
Vertical Divider
|
Fume Hood Use:
|
|
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 Procedure of Application
Development Complete When
Dark blue-stained ridge detail is revealed upon a tap water rinse and the item allowed to air-dry. 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. Incompatibilities
Porous items which absorb the reagent, and dark colored items. Precautions
This is considered to be a messy technique. Storage Container
Dark or Clear stoppered glass bottles. Safety
No known health hazards. Use in a well-ventilated area. 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. Similar Reagent
Sequential Reagents
Vertical Divider
|
Chemical Name
Sudan Black Surface Used On Wet, Non-Porous & Grease-Contaminated Surfaces Sensitive To Sebaceous Components Abridged Reagent Sequence
Vertical Divider
|
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 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.
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.
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:
- 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.
- Minutiae Magazine, Summer Special 1994, Issue No. 24, pg.7.
- "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994.
- Advances in Fingeprint Technology 2nd. Ed., Lee, H.C. & Gaensslen, R.E., CRC Press, Boca Raton, FL., 2001.
- Manual of Fingerprint Development Techniques 2nd. Ed., Home Office - Police Scientific Development Branch, White Crescent Press, Ltd., Luton, England, 2001.
- Technical Notes, Lightning Powder Co. Inc., Salem, OR., 2001.