新型手印提取胶片的制备及其在潜手印显现中的应用研究
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摘要
目的制备一种新型手印提取胶片,使用该胶片对光滑和粗糙、平面和曲面的半渗透性与非渗透性客体表面潜手印进行提取。方法通过凝胶(Gel)粘性材料、聚氨酯(PU)基布及聚对苯二甲酸乙二酯(PET)膜制备新型手印提取胶片,使用该新型手印胶片对不同客体上的潜手印进行粘取,并通过暗视场照明方式对提取手印进行拍照固定。结果新型手印提取胶片对非渗透性客体上新鲜及陈旧手印、半渗透性客体上新鲜手印具有良好的提取显现效果,所提手印的纹线细节清晰、与背景之间的反差较好。结论新型手印提取胶片使用便捷、适用范围广、显现提取效果好,可有效克服客体曲面、粗糙、反光及多色对显现的干扰。
Objective To make a novel gel-lifter for developing latent fingerprints on partial-porous,nonporous,rough and smooth substrates.Methods The gel-lifter was produced with adhesive gelatin,polyurethane substrate(PU) and polyethylene terephthalate film(PET).The latent fingerprints transferred by gel-lifters were imaged under dark-field illumination.Results The gel-lifter has good effect to develop both the fresh fingerprints(whether their substrate is nonporous or partial-porous)and the aged ones on nonporous substrate,resulting in the exposed fingerprints showing clear lines of ridge and distinct contrast against the background which was otherwise substantially interfering in the image quality of the developed fingerprint especially on its curved,coarse,light-reflecting and color-various representatives.Conclusions The new gel-lifter is facile to use,wide scope to apply,and excellent to collect and develop latent fingerprints.
Objective To make a novel gel-lifter for developing latent fingerprints on partial-porous,nonporous,rough and smooth substrates.Methods The gel-lifter was produced with adhesive gelatin,polyurethane substrate(PU) and polyethylene terephthalate film(PET).The latent fingerprints transferred by gel-lifters were imaged under dark-field illumination.Results The gel-lifter has good effect to develop both the fresh fingerprints(whether their substrate is nonporous or partial-porous)and the aged ones on nonporous substrate,resulting in the exposed fingerprints showing clear lines of ridge and distinct contrast against the background which was otherwise substantially interfering in the image quality of the developed fingerprint especially on its curved,coarse,light-reflecting and color-various representatives.Conclusions The new gel-lifter is facile to use,wide scope to apply,and excellent to collect and develop latent fingerprints.
引文
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[3]钟珂,罗兵,张雨.圆柱形拉丝金属把手表面上的汗潜指纹提取[J].刑事技术,2010(5):57-58.
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[5]金忠极.痕迹物证提取新方法—背胶纸在痕迹物证提取方面的利用[J].中国刑警学院学报,2003(3):12.
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[7]孙永泰.刑侦痕迹提取用胶纸小试工艺[J].纸和造纸,2007,26(5):79-80.
[8]PLAZA DT,MEALY JL,LANE JN,et al.Nondestructive biological evidence collection with alternative swabs and adhesive lifters[J].Journal of Forensic Sciences,2015,61(2):485-488.
[9]WIESNER S,TSACH T,BELSER C,et al.A Comparative Research of Two Lifting Methods:Electrostatic Lifter and Gelatin Lifter[J].Journal of Forensic Sciences,2011,56(s1):58-62.
[2]孙年峰,张丽梅,张忠良.利用胶带转印染色法提取灰尘减层手印[J].净月学刊,2014(5):56-58.
[3]钟珂,罗兵,张雨.圆柱形拉丝金属把手表面上的汗潜指纹提取[J].刑事技术,2010(5):57-58.
[4]佟德鑫.对硅橡胶法提取特殊物体表面汗潜手印的研究[J].辽宁警专学报,2007(3):58-59.
[5]金忠极.痕迹物证提取新方法—背胶纸在痕迹物证提取方面的利用[J].中国刑警学院学报,2003(3):12.
[6]吕建中.DT胶纸小试工艺[J].浙江造纸,1996(2):25-26.
[7]孙永泰.刑侦痕迹提取用胶纸小试工艺[J].纸和造纸,2007,26(5):79-80.
[8]PLAZA DT,MEALY JL,LANE JN,et al.Nondestructive biological evidence collection with alternative swabs and adhesive lifters[J].Journal of Forensic Sciences,2015,61(2):485-488.
[9]WIESNER S,TSACH T,BELSER C,et al.A Comparative Research of Two Lifting Methods:Electrostatic Lifter and Gelatin Lifter[J].Journal of Forensic Sciences,2011,56(s1):58-62.