CHESAPEAKE BAY DIVISION - IAI
  • Home
  • About Us
  • Membership
  • Conferences
  • Seminars
  • Webinars
  • Students
  • Resources
  • Vendors
  • Job Opportunities/Training
  • Interactive Chemical Reagent Program
  • ACE-V Methodology

Liqui-Nox

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
(In a shallow bowl mix)
  • 20 drops tap water
  • 20 drops Liqui-Nox
  • 0.5 g black fingerprint powder



​






​
Procedure of Application
  1. Mix the ingredients to create a foam with bubbles.
  2. Use a camel hair brush to paint the tape surface with the mixture.
  3. Wait 30 to 60 seconds.
  4. Rinse tape under a gentle stream of tap water. Allow the tape to air dry.
  5. Photograph any developed detail.





​
​
Development Complete When
Ridge detail is developed upon a water rinse.













​
Source of Error
The consistency of the reagent mixture should be as that of 'shaving cream with small bubbles'.












​
Incompatibilities
Dark colored tapes should be processed using gray fingerprint powder in the reagent mixture instead of black fingerprint powder.











​
Precautions
Practice getting the proper consistency of the reagent mixture prior to use in casework.












​
Storage Container
The reagent is mixed fresh with each new application.













​
Safety
Avoid getting any reagent into your eyes. 



​









​
Recommendations
It may be helpful to grind the dried reagent mixture in a mortar before adding water.












​
Similar Reagent
  • Gentian Violet
  • Small Particle Reagent
  • Sudan Black
  • Sticky-Side Powder









​
Sequential Reagent
​Not Necessarily in this Order:
  • Liqui-Drox
  • Small Particle Reagent










​
Vertical Divider
Chemical Name
Liqui-Nox
​Surface Used On
Adhesive Tape Surfaces
​
Sensitive To
Sebaecous/Eccrine Components
​
Abridged Reagent Sequence
  1. Visual Examination
  2. Forensic Light
  3. Gentian Violet
  4. Liqui-Nox
  5. Liqui-Drox​
  6. Forensic Light
Vertical Divider
Ridge Detail Visualized by:
Visible chemical/stain reaction


Reagent Applicabilities:
Non-Porous surfaces
Tape Surfaces

Other Chemical Name(s):
Alternate Black Powder

​Working Solution Shelf-life:
Prepared as needed

Process Summary:
Liqui-Nox is a laboratory glassware soap that is used to create a soap/powder foam that is painted unto adhesive tape surfaces. ​

Accepted Deviations:
The reagent mixture can be prepared, then allowed to dried to produce a residue. This dried residue can be reconstituted by the addition of tap water until the desired consistency is obtained. Ash Gray fingerprint powder can be used in place of black fingerprint powder to develop ridge detail on black electrical tapes. ​

Supporting Reference Materials:
  1. Minutiae Magazine, Summer Special 1994, Issue No. 24, pg.7.
  2. "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994.
  3. Advances in Fingeprint Technology 2nd. Ed., Lee, H.C. & Gaensslen, R.E., CRC Press, Boca Raton, FL., 2001.
  4. Manual of Fingerprint Development Techniques 2nd. Ed., Home Office - Police Scientific Development Branch, White Crescent Press, Ltd., Luton, England, 2001.
  5. 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
Technical Problems
Problem with website?

Please contact:
Da-il Kim, Webmaster
cbdiaiwebm@gmail.com
Social
Copyright © Company. All Rights Reserved.
  • Home
  • About Us
  • Membership
  • Conferences
  • Seminars
  • Webinars
  • Students
  • Resources
  • Vendors
  • Job Opportunities/Training
  • Interactive Chemical Reagent Program
  • ACE-V Methodology