Development of latent fingerprints on wet non-porous surfaces with SPR based on basic fuchsin dye

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• 作者：Richa Rohatgi ; ^{rrohatgi2010@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; A.K. Kapoor ^{anupkapoor46@rediffmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Fingerprints ; Forensic science ; Small particle reagent
• 刊名：Egyptian Journal of Forensic Sciences
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：6
• 期：2
• 页码：179-184
• 全文大小：1632 K

文摘

Small particle reagent (SPR) is a technique performed to detect latent fingerprints left on wet and moist surfaces based upon the reaction between fatty acid residuals present in the traces and hydrophobic tails of the specific reagent. Those tails are linked to a hydrophilic head of zinc carbonate based formulation to give coloured precipitate. In the present study, we have prepared a novel SPR formulation constituting of zinc carbonate based on basic fuchsin dye for the development of latent fingerprints on wet surfaces. It was shown to develop clear, sharp and detailed fingerprints on non-porous surfaces after these were immersed in water for up to 45 days. The ability of the present formulations to detect weak and chance prints not only enhances its utility, but also its potentiality in forensic casework investigations. The raw materials used to prepare the SPR are cost-effective and non-hazardous.