Oil Red O (ORO) reagent for detection of latent fingermarks: a review

Egyptian Journal of Forensic Sciences

Gurvinder Singh Bumbrah¹  Gurvinder Singh Sodhi²  Jasjeet Kaur³ 

[1] Department of Forensic Science, Punjabi University, Patiala, India;Forensic Science Unit, S.G.T.B. Khalsa College, University of Delhi, Delhi, India;Shaheed Rajguru College of Applied Sciences for Women, University of Delhi, Delhi, India

关键词: Fingerprints;    Latent impressions;    Oil Red O;    Porous item;    Wet surfaces;   

DOI  :  10.1186/s41935-018-0107-1

学科分类：生理学与病理学

来源: Springer

【 摘 要 】

Fingerprints are most frequently used to establish the identity of a person in medicolegal cases. Wide range of methods (optical, physical, and chemical) can be used to detect latent fingerprints on porous and non-porous items recovered from crime scenes. Oil Red O, also called solvent red 27, is a lipophilic dye, which means that it stains fat and lipid components in biological samples. It is also used to stain oil and waxes to a red hue. Oil Red O is used to detect latent fingerprints on dry and wet porous items like paper and cardboard. The reagent develops clear, stable, and red-colored fingerprints which may be discerned in natural light. Although the physical developer can also lift latent impressions from wet porous surfaces, the method is a multistep one and requires immersion of delicate, paper-like articles in a sequence of working solutions. Compared to that, the operational steps of Oil Red O method are simple and cost effective and require less equipment to process items.

【 授权许可】

CC BY