Cynoacrylate Fuming for Latent Fingerprints Development:- Forensic Fingerprint

Cyanoacrylate Fuming / Superglue Fuming


Cyanoacrylate fuming is a chemical method for development of latent fingerprints.

 Cyanoacrylate fuming is also known as Superglue fuming . Fingerprints developed

 by this technique are semi-permanent , the prints were visible in white color and you

 can enhance them by using fingerprints powder or by using dyes.


Mechanism  - All of us know that  sweat pores are presents on the friction ridges of

hand and due to the secretion from these pores , our fingerprints has been formed. The

fingerprints contains water , salt , amino acids , proteins , fatty acids , sodium and

potassium .when we use cyanoacrylate fuming ( superglue fuming ) technique,

 the vapors of cyanoacrylate react with fatty acids, amino acids and with proteins

 present in a latent fingerprints .

 
Procedure - Superglue chambers or cyanoacrylate chambers are available and they are

used for latent fingerprint development.
The exhibit are placed in an airtight tank along

 with a small heater .Few drops of liquid super glue are placed in an open container and

 it placed on top of the heater inside the tank. Sealed the tank and activate the heater.

 Switch on the process button and inside the superglue chamber polymerization of

 ethyl or methyl 2 cyanoacrylate take place. When the desired result achieved start

 the purge cycle which remove all the fumes.

Now a days automatic (cyanoacrylate) superglue fuming chambers are present in which

humidity , fuming timing and fume evacuation time are adjusted by the user. This leads

 to exact duration and proper fuming. Proper position of exhibits in the superglue

chamber possible as it has hanging rods and shelves. From beginning to end fuming

 system is automatically adjusted.Automatic system save the labor of the user.

Cyanoacrylate fuming / superglue fuming used on plastics , garbage bags , electric

 tape , glass , Styrofoam , unfinished wood , rubber , carbon paper , cellophane and

smooth rocks. Also used on bottles , knives , dead bodies and guns. Cyanoacrylate 

superglue used on multicolored surfaces for visualization of fingerprints. After

visualization of fingerprints use fluorescent dyes or powders for enhancement of

 fingerprints. Depending upon the background color the powder will be selected. 
 
Disadvantage  - One disadvantage of cyanoacrylate fuming / superglue fuming

is that if you leave the print too long in the developing superglue chamber its

 lead to over-glue of the print as the super glue fill the ridges in the fingerprints.


Popular methods for superglue fasting process is
Apply it to cotton pads. it is safe and provides faster fuming than just placing article in a fuming chamber. Heat application is effective in speeding up the development . It is done by using a small coffee warmer.
Conclusion  - Many methods are presents for developing of fingerprints but

cyanoacrylate fuming / superglue fuming is very easy and effective. It is the number one choice for

 locating fingerprints. This technique is effectively used on old and new fingerprints and the

fingerprints further enhanced by using of powders or by using of dyes. The crime scene investigator 

must consider it to the crime scene equipment kit — if hasn't been done .
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