Abstract: Method for detecting fingerprints comprising: providing a chamber 1 suitable for containing a substrate 2 suspected of containing a fingerprint; bringing the temperature of the chamber to a target temperature below ambient temperature utilizing a refrigeration unit 3 operatively associated with the chamber; placing the substrate suspected of containing a fingerprint in a suitable location 4 within the chamber and maintaining the substrate therein for a time sufficient to allow the substrate to attain the target temperature; bringing the humidity within the chamber to a target humidity utilizing a nebulizer/humidifier 5 operatively associated with the chamber and employing circulation fan 14 to ensure uniform temperature, humidity and vapor content throughout the chamber; providing a cyanoacrylate powder 6 in the chamber and raising the temperature of the cyanoacrylate powder to a temperature which vaporizes the cyanoacrylate powder utilizing a cyanoacrylate accelerator 7 operatively associated with the chambe

Abstract: Process for producing powdered polycyanoacrylate polymer by charging a reaction vessel with an aqueous mist, dripping a 2-cyanoacrylate into the reaction vessel, allowing the resulting reaction mass (polycyanoacrylate polymer) to cool, removing the polycyanoacrylate polymer from the reaction vessel, drying it, and pulverizing the dry solid into a powder. Powdered polycyanoacrylate polymer having a particle diameter in the range of from 1 to 200 microns. The particle size and shape herein contribute to uniform distribution of fumes during fingerprint capture. A high level of accuracy in fingerprint detection is provided among three distinct levels which include: (a) first level detection from ridge flow patterns such as whorl or loop; (b) second level detection from ridge flow singularities such as ridge endings and bifurcations; (c) and third level detection from pore configuration.

Abstract: Process for producing powdered polycyanoacrylate polymer by charging a reaction vessel with an aqueous mist, dripping a 2-cyanoacrylate into the reaction vessel, allowing the resulting reaction mass (polycyanoacrylate polymer) to cool, removing the polycyanoacrylate polymer from the reaction vessel, drying it, and pulverizing the dry solid into a powder. Powdered polycyanoacrylate polymer having a particle diameter in the range of from 1 to 200 microns. The particle size and shape herein contribute to uniform distribution of fumes during fingerprint capture. A high level of accuracy in fingerprint detection is provided among three distinct levels which include: (a) first level detection from ridge flow patterns such as whorl or loop; (b) second level detection from ridge flow singularities such as ridge endings and bifurcations; (c) and third level detection from pore configuration.