Alkali-502 glue fingerprint fumigating and appearing method and fumigating and appearing box

Abstract

The present application discloses a strong base-502 glue fingerprint smoke revealing method and a smoke revealing box for carrying out said method. Said method comprises the following steps: putting a NaOH containing alkali cotton ball into a vessel of a smoke revealing box equipped with drop holes and openings; facing the opening position of the smoke revealing box to the fingerprint position, which abuts on an objective and is sealed; dropping the 502 glue continuously to the alkali cotton ball to initiate a natural reaction of 502 glue and NaOH to generate alpha-ethyl cyanoacrylate gas, wherein the fingerprint appears due to a polymerization reaction when said gas meets trace moisture. Said smoke revealing box comprises a box body, the top surface and at least one side surface and bottom surface thereof being equipped with openings, each opening being equipped with a push-pull lid, the top surface having a drop hole, a vessel being deposited inside the box housing, the opening of the vessel facing to the drop hole of the box body. The smoke revealing box as well as the smoke revealing method in accordance with the present application, capable of being manufactured simply, being operated conveniently, and being taken-with to a exploration scene, resolves the problem that fingerprint revealing of a too big, too heavy unmovable object is difficult.

Description

technical field [0001] This application belongs to criminal investigation equipment. Background technique [0002] Fingerprints play an important role as evidence in criminal proceedings. Fingerprints need to be visualized when extracting them. Fingerprint visualization method is very simple. The closest technique to this application is the 502 glue visualization method. It can reveal the fingerprint of non-penetrating objects. The display method is to put the object with fingerprints in the fumigation cabinet of the laboratory, put the heating dish in the fumigation cabinet into 502 glue, heat the 502 glue, and the a-cyanoacrylate ethyl ester in the 502 glue volatilizes into gas When the gas meets the trace moisture on the fingerprint, it will polymerize and show the fingerprint. This method is relatively advanced. But the disadvantage is that the items with fingerprints are often too large, too heavy or immovable, and it is impossible to carry them to the laboratory ...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the items with fingerprints are often too large, too heavy or immovable, and it is impossible to carry them to the laboratory to display fingerprints in the fumigation cabinet

Therefore, in field surveys, this fingerprint fumigation method is limited, although the method is good, it does not play a role

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