胶带粘面手印荧光显现剂的研发与应用

目的根据胶带粘面上潜在手印的特点,利用染料和潜手印的理化性质,研究开发胶带粘面手印荧光显现剂。方法在各种胶带粘面上显现潜在手印,并与常规的碳素墨水染色法进行比较。结果在长波紫外线照射下手印呈黄色明亮荧光,手印纹线清晰、连贯,基本不受手印遗留时间、客体表面颜色和性质的影响。结论胶带粘面上的汗潜手印和血潜手印用荧光显现剂显现效果优于碳素墨水染色法,在实际案件的侦破中有较好的应用前景。

The exploitation and application of the fluorescent powders for developing fingerprints on the sticky surface of adhesive tape

Objective To exploit fluorescent powders for developing fingerprints on the sticky surface of adhesive tape.Methods Latent fingerprints on various adhesive tapes were developed with fluorescent powders and the results were compared with the conventional carbon ink dyeing method.Results In the long-wave ultraviolet irradiation,the fingerprints show up bright yellow fluorescent,the papillary ridges of fingerprint appear clear,coherent and aren＇t affected by the time,the surface color and properties of the objects.Conclusion For developing the sweat and blood latent prints on the sticky surface of adhesive tapes,fluorescent powders is better than carbon ink dyeing,and the fluorescent powder method shows a good application prospect in the casework.