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DFO、IDO显现法都是显现纸张等渗透性客体上汗液手印的有效方法。对这两种显现方法的灵敏度进行研究有利于实际应用时的正确选择。实验比较研究发现:不同客体、不同遗留时间及不同次数遗留的手印,IDO显现法的灵敏度都要高于DFO法。牛皮纸、报纸等客体上遗留时间较长、形成次数较多的汗液手印的显现,应优先考虑使用IDO显现法。
DFO, IDO appearance method is to show the paper and other objects on the permeability of fingerprints on the sweat effective method. Studying the sensitivity of these two visualization methods is in favor of the correct choice in practical application. The experimental comparison study found that the fingerprints left by different objects, different dwell times and different times, the sensitivity of IDO appearance method is higher than that of DFO method. Kraft paper, newspapers and other objects longer retention time, the formation of a larger number of sweat fingerprints appear, priority should be given to the use of IDO appearance method.