Superglue vapor, ethyl or methyl cyanoacrylate, polymerises on some latent fingerprints to produce a white deposit. This polymerisation is thought to be catalyzed by the water and possibly some other constituents of latent fingerprints. The effectiveness of the process is very dependent on the processing conditions. Atmospheric pressure, normal room temperature, and a relative humidity of 80% is recommended. It will develop fingerprints on a range of surfaces. The contrast of developed fingerprints may often be improved by application of fluorescent dyes and subsequent Fluorescent Examination.

CYANOACRYLATE VAPOR – Alternative Process Names

MAY BE USED ON:

Most non-porous surfaces.

NOT SUITABLE FOR USE ON:

Most porous surfaces.

ADVANTAGES

Easy to use.

DISADVANTAGES

Developed fingerprints can be difficult to see and record on light surfaces. Use of a fluorescent dye is essential on light surfaces to reveal maximum number of fingerprints.

CAN INTERFERE WITH FORENSIC EXAMINATION FOR:

Handwriting, ink, paper and indented impressions, body fluids, hairs, paint and most other forensic examinations, including firearms.

SAFETY REQUIREMENTS

This section provides a summary of some aspects of the safety of the process.

Recommended safety procedures:

Inform all staff preparing or using Superglue or preparing or using any associated dye staining solutions of the hazards of involved and safety precautions to be taken.

Wear laboratory coats and non-porous gloves when preparing or using Superglue preparing or using any associated dye stain solutions. Eye protection should be worn if there is any risk of splashing solution into the eyes.

Provide facilities in the immediate vicinity for washing eyes and other affected areas with water if splashed with chemicals.

Wear respirators fitted with an organic vapor and particle combined filter when cleaning inside of the exposure chamber.

Store and examine treated articles in a well ventilated area.

If water based dye solutions are sprayed a fume cupboard should be used.

If eyes become contaminated with Superglue seek medical attention immediately.

If areas of the skin become bonded together with Superglue, it is usually possible to separate them by soaking in warm water; if not, a small amount of 2-Ethoxyethanol may be used. This should not be used repeatedly on skin and must be used on the face. If it proves impossible to separate the areas of skin medical attention may be required.