P-dimethylaminocinnamaldehyde(DMAC)is a very sensitive fluorescence reagent for the detection of latent fingerprint. In this paper,based on the investigation of the optical properties of DMAC,we investigate the optimum conditions,the sensitivity and the application effect of DMAC to the different types of paper. The experimental results show that when the concentration of 0. 02g· L-1 ,DMAC can achieve the best result to the latent fingerprint detection that deposited on ordinary paper,thermal paper and news-paper,and the fingerprint lines is appeared clearly and coherently. Even for the paper that stored for one years,the results are still well.%对二甲氨基肉桂醛(DMAC)是一种十分灵敏的潜在手印显现荧光试剂,本文在探讨其光学性能的基础上,通过大量样本实验考察了DMAC做为手印显现试剂时的最佳条件、灵敏度以及其在不同渗透性客体检材的应用效果.实验结果表明,浓度0.02g·L-1的DMAC对普通纸张、热敏纸和报纸上的潜在手印显现可达到最佳效果,显出手印纹线清晰、连贯,即使是对存放1年的纸张检材,仍保持良好效果.
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