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为确定手印红外辐射显现法在纸张表面汗潜手印程序化显现方法中的地位,以打印纸、报纸、牛皮纸为检材,采用红外辐射法、茚三酮法、硝酸银法、DFO法对检材表面汗潜手印进行程序化显现实验研究,结果表明,采用红外辐射致荧光显出的手印可用DFO法、茚三酮法、硝酸银法加强手印的反差;采用红外辐射致炭化显出的手印,可采用茚三酮法、硝酸银法进行手印反差加强;用DFO法、茚三酮法、硝酸银法显现后的手印亦可采用红外辐射致手印炭化法进行加强,从而明确了红外辐射法在纸张表面汗潜手印程序化显现方法中的地位。这一结论为红外辐射法在现场手印显现中的应用提供了可靠的依据。
In order to determine the position of fingerprinting infrared radiation appearance method on the surface of paper, the printing paper, newspaper and kraft paper were used as the samples to detect the infrared radiation, the ninhydrin method, the silver nitrate method and the DFO method The results showed that DFO method, ninhydrin method and silver nitrate method were used to enhance the contrast of fingerprints. The fingerprints that were carbonized by infrared radiation were displayed. , The ninhydrin method and the silver nitrate method can be used to enhance the handprints contrast. The DFO method, the ninhydrin method and the silver nitrate method can also be used to strengthen the fingerprints after being exposed by the silver fingerprinting method, so that the infrared radiation method Sweat latent fingerprints on the surface of the paper programmatic approach to show the status. This conclusion provides a reliable basis for the application of infrared radiation method in the presence of handprint.