关键词:

指纹学, 油红O, 物理显影液, 油脂指印, 联合显现

Abstract:

As a kind of legal evidence, fingerprints play an important role in the investigation and litigation stage. According to the different substances deposited by fingerprints, the methods of fingerprints development are also different. Physical developer is a standard method to deal with latent fingerprints on wet and porous objects. It can show excellent results for fingerprints in lipids, but physical developers have inherent defects. Since Oil Red O was applied to the field of forensic science, it has received widespread attention because it is more practical and cost-effective than physical developer to a certain extent. In this article, the development process of Oil Red O is briefly summarized, the advantages and disadvantages of the original formula and the improved formula of Oil Red O are summarized in various aspects, and the appearance of two methods of Oil Red O and physical developer under various conditions are compared. In addition, the effect and position of Oil Red O in the application sequence of fingerprint development methods are summarized. This article provides a certain reference for the development, use and promotion of Oil Red O.

Key words:

dactylography in lipids, Oil Red O, physical developer, grease fingerprint, joint manifestation