CHESAPEAKE BAY DIVISION - IAI
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M.R.M. 10

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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
Stock Solution A: 
1 g Rhodamine 6G powder dissolved in 1 liter of Methanol.

Stock Solution B:
2 g Basic Yellow 40 dissolved in 1 liter of Methanol.

Stock Solution C:
1 g M.B.D. powder dissolved in 1 liter of Acetone.

M.R.M. 10 Working Solution:
(Combine in the order listed)
3 ml Stock Solution A.
3 ml Stock Solution B.
7 ml Stock Solution C.
20 ml Methanol
10 ml Isopropanol
8 ml Acetonitrile
950 ml Petroleum ether
Procedure of Application
  1. Spray, immerse or use a squirt bottle to apply the M.R.M. 10 solution to the item.
  2. Examination under a laser or Forensic Light Source at 430 nm to 530 nm. Use orange colored goggles.
  3. Photograph results using a orange colored or 550(BP 35) bandpass filter.




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Development Complete When
The cyanoacrylate has absorbed the dye stain.







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Source of Error
Surfaces that absorb too much dye stain will fluoresce too brilliantly to be effective for photography.






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Incompatibilities
Items that inherently fluoresce in the 490 nm to 555 nm range will interfere with the dye stain fluorescence.









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Precautions
Avoid excess build-up of cyanoacrylate, since this may result in ridge detail depicting little contrast to the strongly fluorescent surface.








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Storage Container
Dark stoppered glass or plastic bottles.







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Safety
Fume hood use is required when preparing and applying the reagent. 









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Recommendations
The recommended procedure of application is to immerse the item in a tray of the dye.

A rinse using Methanol may be necessary to reduce excessive staining by the dye.






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Similar Reagent
  • Ardrox
  • Basic Yellow 40
  • Basic Red 28
  • Liqui-Drox
  • M.B.D.
  • Nile Red
  • R.A.M.
  • R.A.Y.
  • Rhodamine 6G
  • Safranin O
  • Thenoyl Europium Chelate

​
​
Sequential Reagent
​Not Necessarily in this Order:​
  • R.A.M.
  • R.A.Y.
​








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Chemical Name
M.R.M. 10
​Surface Used On
Non-Porous Surfaces
​
Sensitive To
Cyanoacrylate Deposit
​
Abridged Reagent Sequence
  1. Visual Examination
  2. Forensic Light
  3. Cyanoacrylate Fuming
  4. Rhodamine 6G
  5. Forensic Light
  6. M.R.M. 10
  7. Forensic LIght​
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Ridge Detail Visualized by:
Forensic Light Source induced
​
Reagent Applicabilities:
Non-Porous Surfaces
Fluorescent Technique
Post Cyanoacrylate

Other Chemical Name(s):
None

Working Solution Shelf-life:
Six (6) months

Process Summary:
A mixture of fluorescent dye-stains used to enhance cyanoacrylate-developed latent prints. A fluorescent light source that will output light between 430 nm and 530 nm is required for this process. ​

Accepted Deviations:
Spray, immerse or use a squirt bottle to apply the M.R.M. 10 solution to the cyanoacrylate-fumed item. ​

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.

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
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  • Students
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  • ACE-V Methodology