M.R.M 10

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Chemical Name:
M.R.M 10 		Surface Used On:
Non-porous surfaces.		 Sensitive To:
Cyanoacrylate deposit.
Development Color: Method to Record: Hazard: Protective Clothing: Fume Hood Use:

Orange fluorescence
Orange filter
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
|
Cyanoacrylate fuming
|
Rhodamine 6G
|
Forensic Light
|
*** M.R.M. 10 ***
|
Forensic Light

 M.R.M. 10 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.


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.

[ Return to: Main Page   ||  Non-Porous Surfaces  ||  Fluorescent Techniques  ||  Post-cyanoacrylate  ||  Metal Surfaces  ||  Glass Surfaces  ||  Plastic Surfaces  ||  Cartridges  ]