Rousseau Mélina, Ledroit Pierre, Malo Marianne, Henrot Damien, Guille Hélène
Forensic Science Laboratory of the French Gendarmerie, 5 boulevard de l'Hautil, BP 60036 ERAGNY, 95001 CERGY PONTOISE cedex, France; University of Maine Institute of Technology, Chemistry Department, Avenue Olivier Messiaen, 72085 LE MANS cedex 9, France.
Forensic Science Laboratory of the French Gendarmerie, 5 boulevard de l'Hautil, BP 60036 ERAGNY, 95001 CERGY PONTOISE cedex, France.
Sci Justice. 2020 Sep;60(5):473-479. doi: 10.1016/j.scijus.2020.07.002. Epub 2020 Jul 10.
Powder suspensions such as wet powder are used to develop fingermarks on adhesive surfaces. They can also be used on gloves but these ready-to-use commercial pre-mixed solutions are not entirely satisfactory. Among other things, they generate some background noise that can sometimes be substantial and make the exploitation of the fingermarks difficult. Recent studies have proven the effectiveness of a HFE ninhydrin solution on some types of gloves. Ninhydrin and 1,2-indanedione are reagents that are commonly used for the visualisation of fingermarks on porous and semi-porous substrates. Applying them on gloves might help to overcome the issue of background noise being produced by powder suspensions. In this study, several formulations of ninhydrin and 1,2-indanedione are compared to wet powder on a sample of nitrile, latex and vinyl gloves. The subsequent results show a greater effectiveness with the use of wet powder.
粉末悬浮液（如湿粉）用于在粘性表面上显出手印。它们也可用于手套，但这些现成的商业预混溶液并不完全令人满意。除此之外，它们会产生一些背景噪音，有时可能很大，这使得手印的利用变得困难。最近的研究证明了HFE茚三酮溶液对某些类型手套的有效性。茚三酮和1,2-茚二酮是常用于在多孔和半多孔基材上显出手印的试剂。将它们应用于手套可能有助于克服粉末悬浮液产生背景噪音的问题。在本研究中，将茚三酮和1,2-茚二酮的几种配方与湿粉在丁腈、乳胶和乙烯基手套样本上进行了比较。随后的结果表明，使用湿粉的效果更好。
