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Development of latent Fingerprint technique: incorporating Biopolymer developed from Banana sheath fibre and utilizing it in Fuming method

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Author Affiliations

  • 1Schiio of Biosciences and Bioengineering, Division of Forensic Science, DY Patil International University, Akurdi, Pune, Maharashtra-411044, India
  • 2Division of Forensic Science, Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu-641114, India

Res. J. Forensic Sci., Volume 14, Issue (2), Pages 13-17, July,29 (2026)

Abstract

The objective of this study was to create a new method as an alternative to the cyanoacrylate fuming technique and other chemical processes typically employed in forensic science for latent fingerprint enhancement. By harnessing the potential of extracted biopolymers, we aim to move away from the use of carcinogenic chemicals in the development of latent impressions. Our goal is to explore a more natural approach to latent impression enhancement. A fume hood was used to heat a beaker containing cellulose content. Coconut oil, a natural ester, was added and heated until fumes were produced. A non-porous surface, such as a glass slide with a fingerprint, was placed inside the fuming chamber. After 5 minutes, the fumes reacted with the fingerprint, resulting in a white deposition over it. This study focuses on the natural approach of extracting biopolymer from banana sheath fibre. The decision to focus on banana sheath fibre was made due to the significant cellulose content present in it, making it a promising source for biopolymer extraction. This research deliberately selected a bio-ester that aligns with the project's natural ethos. The chosen bio-ester is coconut oil, a widely recognized natural ester that is rich in fatty acids and triglycerides, demonstrating potential for effective biopolymer formation. In the course of experiments, fuming method was used for development of latent impression over glass surface, a distinct white deposition was observed on the glass surface where the fingerprint had been placed.

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