Abstract：
Oil Red O is a fingermark reagent that is useful for developing greasy fingermarks. Classic Oil Red O formulation is based on methanol-water solution. The use of solvent can be harmful to the forensic practitioner and the environment. Moreover, solvent can destroy hand writing and biological traces. In this paper a new solvent-free Oil red O deposition method have been proposed. Experimental method is based on Oil Red O deposition from a gas phase in reduced pressure conditions. 1728 split, greasy fingermarks deposited on paper have been developed with the new method and a benchmark one. The development results have been compared. The general performance of the new method has been found inferior to the solvent based formulation. However, in most cases both methods were comparable. This shows that the experimental method could be a possible alternative to the classic one in the cases where drawbacks connected to the solvent use are unacceptable. Even though, presented results are promising, more research and optimization is necessary, before the new method can be included into the forensic expert toolbox.
摘要：
油红O是一种指纹试剂，可用于开发油腻的指纹。经典油红O配方基于甲醇-水溶液。溶剂的使用可能对法医和环境有害。此外，溶剂可以破坏手写和生物痕迹。本文提出了一种新的无溶剂油红O沉积方法。实验方法基于在减压条件下从气相沉积的油红O。1728分裂，用新方法和基准方法开发了沉积在纸上的油腻指纹。对开发结果进行了比较。已发现新方法的一般性能劣于溶剂基制剂。然而,在大多数情况下，两种方法具有可比性。这表明,在与溶剂使用相关的缺点不可接受的情况下,实验方法可以是经典方法的可能替代。即使,提出的结果是有希望的，需要更多的研究和优化，才能将新方法纳入法医专家工具箱。
